chemistry letters · shin-ya kishioka and akifumi yamada. c-50 chemistry letters vol.33, no.4...

Chemistry Lettershttp://www.csj.jp/journals/chem-lett/

Vol.33 No.4 CMLTAGApril, 2004 ISSN 0366-7022

Copyright � 2004 The Chemical Society of Japan

362 Palladium Catalyzed Aerobic Dehydrogena-tion: From Alcohols to Indoles and Asym-metric Catalysis

Pd0PdII

NR

O2

NR

Pd

O

RSRL

OH

RSRL

H2O

OH

RSRL46

Palladium 106.42

(±)-

OxidativeKinetic

Resolution

Non-Oxygen TransferOxidative Cyclizations

Brian M. Stoltz

Catalytic aerobic dehydrogenation of organic substrates is going through a Renaissance. Recent advances in this areahave led to the discovery of palladium-catalyzed alcohol dehydrogenations and oxidative hetero- and carbocyclizations.The development of asymmetric catalytic dehydrogenations is the latest advance in a long line of catalytic asymmetricoxidation reactions.

Highlight Review

Letter

368 Loop Formation of Au Nanopaticles Adsorb-ed on Langmuir Monolayers

A Hybrid monolayer of a cationic amphiphile andAuloop structure of the nanoparticles. The loops were0.1−1 µmconsisted of the single particle strings.

200nm

nanoparticles at the air−water interface showed

in size with a width of around 5 nm, and

Takeshi Kawai and Tomoyuki Watanabe

C-46 Chemistry Letters Vol.33, No.4 (2004)

Copyright � 2004 The Chemical Society of Japan http://www.csj.jp/journals/chem-lett/

370 Syntheses of Silver Nanofilms, Nanorods, andNanowires by a Microwave-polyol Method inthe Presence of Pt Seeds and Polyvinylpyr-rolidone

AgAg+Pt seeds + PVP

Ethylene glycol

Microwave heating

Preparation of Ag nanostructures 500 nm

Masaharu Tsuji, Yuki Nishizawa, MasayukiHashimoto, and Takeshi Tsuji

372 Preparation of Comb-like OrganoboronPolymer Electrolyte without Generation ofSalt

MeO O

O O O OB

O

O O O OB

OO

O

OMe

OMe

n

m

n

m

m

Noriyoshi Matsumi, Tomonobu Mizumo, andHiroyuki Ohno

374 Synthesis of SBA-1 Mesoporous Silica Crys-tals with Tunable Pore Size Using SodiumSilicate and Alkyltrimethylammonium Sur-factants

C18TACl C16TMABr C14TMABr

Surfactant chain-length dependence of the SBA-1

mesoporous silica crystal.Man-Chien Chao, Hong-Ping Lin, Da-ShinWang, and Chung-Yuan Mou

376 An All-solid-state Lithium Battery withSulfur as Positive Electrode Materials

0.0

1.0

2.0

E /

V

0 200 400 600 800 1000 1200

1st. dis.

2nd. dis.

10th. dis.

1st. cha. 2nd. cha.

10th. cha.

cut off voltage: 0.3 2.6Vcurrent density: 64 A.cm-2

capacity of sulfur / mA.h.g-1

0 0.5 1 1.5 2electrons / Cu atoms

2.5 3 3.5

3.0

Li4.4Ge | a-60Li2S • 40SiS2 | sulfur+copper+a.b.

3rd cha.

3rd dis.

µ

Nobuya Machida and Toshihiko Shigematsu

378 Deposition of Nanostructured Diamond-like Carbon Films on Al Substrate by FacileElectrochemical Route A and

1560−1600 cm−1 ,

Raman

the

electrolysis

150 V are typical DLC films.

bands,

1000 1200 1400 1600 1800

Inte

nsi

ty /

a.u

.

Raman shift / cm-1

2800 3000 3200

Tra

nsm

itta

nce

/a.u

.

Wavenumber /cm-1

at with the so-calledidentified

peakbroadashoulder peak at −11355 cm

of dimethylsulfoxide (DMSO) at

that films deposited on Al substrate by

indicaterespectively,G andD

He-qing Jiang, Li-na Huang, Zhi-jun Zhang,Tao Xu, and Wei-min Liu

Chemistry Letters Vol.33, No.4 (2004) C-47


380 A Facile and Novel Route to 99mTc-labeledAntimony Sulfide Nanocolloid

BERSb2S3 +

99mTcO4-

Saline, r.t.

20 nm

TEM image of99mTc-Sb2S3 nanocolloid

Sang Hyun Park, Sang Mu Choi, Hui JeongGwon, and Kyung Bae Park

382 Structures and Magnetic Properties ofOrganic Biradical Compounds with anAromatic Core and Long Alkyl Groups

O C

O

O (CH2)11OC

O

O(CH2)11NO N O

J = –40 K (singlet-triplet model)

O C

O

O (CH2)11

OC

O

O(H2C)11NO

N O

J = –38 K (singlet-triplet model)

Takamitsu Amano, Hiroki Akutsu, Jun-ichiYamada, and Shin’ichi Nakatsuji

384 Rapid Equilibrium between Trigonal-bipyr-amidal and Square-pyramidal Geometriesof 1-Popanethiolato Platinum(II) Complexwith Tris[2-(diphenylphosphino)ethyl]phos-phine

PPt

P

P

SR

P P

RS P

PPt

PI

H2O PPt

P

P

I

P+ I–

+ RS–

K, kex

Sen-ichi Aizawa and Tadashi Kobayashi

386 GaAs Nanocrystals via Hydrothermal RedoxReaction

Gallium ofarsenide nanocrystals

35 nm in size were synthesized

via hydrothermal redox reaction

metalof gallium with O32As

and following annealing.

Shuo Wei, Jun Lu, Weichao Yu, Houbo Zhang,and Yitai Qian

388 Intramolecular (2�þ 2�) Photocycloaddi-tion of Styrenes Tethered by Siloxanes

Si SiO

Me

Me

Me

MeSi Si

O

Me

Me

Me

Me

hν

benzene

Hajime Maeda, Hiroaki Yagi, and KazuhikoMizuno



390 Preparation of Controllable CrystallineNano-TiO2 by Homogeneous Hydrolysis

TiOH + O

OH

CH3 CH3

Ti

O

O

H

H

Ti

S

O

O

O

H

CH3SO

OO

H

S O + HOTi

TiO2Ti

O

O

H

H

Ti

Controllable crystalline nano-TiO2 was prepared by homogeneoushydrolysis with toluene-p-sulfonic acid, where the mechamism was shown.

Wei Liu, Ai-Ping Chen, Jia-Ping Lin, Zi-MingDai, Wei Qiu, Wei Liu, Meng-Qin Zhu, andShouji Usuda

392 High Oxide Ion Conductivity in Mg-DopedLa10Si6O27 with Apatite-type Structure

Mg doping increases the ionic

conductivity of apatite-type

La10Si6O27.

0.8 0.9 1 1.1 1.2 1.3 1.4

10-3

10-2

10-1

kK/T

σ / S

cm

-1

x = 0 (1750°C) x = 0.3 (1750°C) x = 0.6 (1700°C) YSZ

800 600700 500T / °C

900

Hideki Yoshioka

394 Synthesis of Dimethyl Ether from Supercrit-ical Methanol in the Presence of Aluminum

Supercritical methanol is treated

above 300 °C with aluminummetal to produce dimethyl ether.

Yuma Usui, Chihiro Wakai, NobuyukiMatubayasi, and Masaru Nakahara

396 Facile Preparation of Anion TrappingPolymer Electrolytes by Reaction between9-Borabicyclo[3.3.1]nonane (9-BBN) andPoly(propylene oxide) HO CH2 CH O

CH3

Hn

B CH2 CH O

CH3

Bn

HB2

+ 2 H2

+

O

Tomonobu Mizumo, Kenji Sakamoto,Noriyoshi Matsumi, and Hiroyuki Ohno

398 Stably-dispersed and Surface-functional Bio-nanoparticles Prepared by Self-assemblingAmphipathic Polymers of Hydrophilic Poly-(�-glutamic acid) Bearing HydrophobicAmino Acids

Surface-functionalprepared by self-assembling amphipathic poly(γ -glutamic acid) with abackbone and phenylalanine andleucine Poly(γ-glutamic acid) bearingphenylalanine excellentwater-dispersibility, surface andappropriate size (200 nm) medicalAdditive PEG nanoparticle

formation poly(γ -glutamic acid).

: Phe

: COO−

: γ -PGA

bionanoparticles were

derivatives hydrophilichydrophobic

side groups.nanospheres

functionalityfor use.

conjugation assistedof leucine-grafted

exhibited

Michiya Matsusaki, Ken-ichiro Hiwatari,Mariko Higashi, Tatsuo Kaneko, and MitsuruAkashi



400 Epoxidation of Styrene by t-Butyl Hydroper-oxide over Gold Supported on Yb2O3 andOther Rare Earth Oxides

t-BuOOH

O

Au/Yb2O3

(Convn. = 64 – 74%) (Sel. = 55 – 73 %)

Gold nanoparticles deposited [by homogeneousdeposition–precipitation (HDP) using urea]on Yb2O3 and other rare–earth oxides (viz.Sm2O3, Eu2O3, and Tb2O3) are novel highlyactive/selective and reusable catalysts for theselective epoxidation of styrene to styreneoxide by anhydrous or aqueous t–butylhydroperoxide.

N. S. Patil, B. S. Uphade, P. Jana, S. K.Bhargava, and V. R. Choudhary

402 Structures andMagnetic Properties of a NewCobalt(II) Linear Trimer with Phenylcin-namic Acid

Yoshimi Oka and Katsuya Inoue

404 Regioselective Formation of Optically ActiveCycloheptatrienes by Chiral TetheredBuchner Reaction

O

O

N2

X

Y Rh2(OCOR)4 O

O O

X

Y

O

O O

X

Y

O

O O

X

Y

>>O

O O

X

Y

O

Takashi Sugimura, Naoko Ohuchi, MasamiKagawa, Kazutake Hagiya, and TadashiOkuyama

406 Synthesis and Stabilization of Ni Nanoparti-cles in a Pure Aqueous CTAB Solution

Szu-Han Wu and Dong-Hwang Chen

408 Lifetime of Veratryl Alcohol Radical CationElectrogenerated in Acetonitrile

H C H

HO

O CH3

OCH3

H C H

HO

O CH3

OCH3

-e• +

-H+

0 1

E / V vs. Ag/Ag+

0.5 µA

Shin-ya Kishioka and Akifumi Yamada



410 Substituent Effect on Regioselectivity inOxygenation of Multisubstituted Acenes

R

R

R

R

or

R

R

1O2

Substituents Effect ?

OO

OO

Xin Zhou, Masanori Kitamura, Baojian Shen,Kiyohiko Nakajima, and Tamotsu Takahashi

412 Decomposition of Carbon Dioxide by theDielectric Barrier Discharge (DBD) PlasmaUsing Ca0:7Sr0:3TiO3 Barrier

There was no virtual difference on CO2 conversion by dielectricbarrier discharge (DBD) plasma using silica glass or aluminaas the dielectric barriers, however, the conversion was much higherusing Ca0.7Sr0.3TiO3, which fabricated by liquid phase sintering at1200

oC for 2 h adding Li2Si2O5 (melting temperature ca.1030 oC) additive. The results suggested that the reactivityof CO2 was significantly improved by increasing the permittivityof dielectric barrier material.

0

2

4

6

8

10

12

14

16

Silica glassAluminaCa0.7Sr0.3TiO3

CO

2 co

nver

sio

n /

%

0

20

40

60

80

100

120

140

160

180

200

Per

mit

tivi

ty

Ruixing Li, Qing Tang, Shu Yin, YukishigeYamaguchi, and Tsugio Sato

414 Synthesis of Macrocyclic Arylene KetoneOligomers Containing the Phthaloyl Moietyby Friedel–Crafts Acylation Reaction

Synthesis and ring-opening polymerizationof macrocyclic arylene ketone oligomers

C

C

O

OCl

Cl+ Ar

C

C

O

O

Ar

n

m

Ar

Ar= S OOO

O

C COO

C OOO

a: b: =

CH2ClCH2Cl/ AlCl3/ NMP

RT

Initiator

1 2a, 2b 3a, 3b

Ar

4a, 4b

Qingzhong Guo, Shuqin Bo, and Tianlu Chen

416 The Studies on the Aqueous Dispersed Parti-cles Formed from Monoolein/Monopalmi-tin/Water Mixture

Cubic particles were formed when monoolein/ monopalitin mixture was dispersed in 5–2000times excess water by vortexing.

Zhining Wang, Joom Y. Um, Liqiang Zheng,and Ganzuo Li

418 Efficient Catalytic Reduction of Concentrat-ed Nitric Acid on the Adsorption Sites ofActivated Carbon

Chemical denitration of concentrated nitric acid by formic acid at low temperature (325 K) was found to occur through 3 stages: (1) induction period, in which the concentration of one of the reaction intermediates, HNO2, increase up to ca. 0.005 mol/L, (2) autocatalytic formation of HNO2 up to 0.07 mol/L, and (3) effective denitration starts by the formation of gaseous reaction products (NO, N2O, NO2, and CO2). The adsorption site of active carbon was found to have a catalytic effect in the first stage. By addition of active carbon (10 g/L), the induction period of chemical denitration was practically suppressed.

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0 60 120 180 240 300 360

Time [min]

HN

O2

[mo

l/L]

Stage 1

Induction

Effectivedenitration

Stage 2 Stage 3

Autocatalytic generation of

HNO2

period

Akane Miyazaki, Kazumasa Shibazaki, YoshioNakano, Mitsuteru Ogawa, and Ioan Balint



420 Generation of 1,6-Disilahexapentaene in theReduction of an Overcrowded Bis(bromo-diaryl)butadiyne Leading to the UnexpectedFormation of 2-Allenyl-1-benzosilole

R

R

R

Mes: R = MeTbt: R = CH(SiMe3)2

Dis = CH(SiMe3)2, Si = SiMe3

Si C C Si

Mes

Tbt Tbt

Mes

C C

KC8

TbtSiMesBr

SiBr

TbtMes

CC

C

Si

C SiSi

Si

H Mes

Dis

DisDis

Dis

SiSi

H MesYoshiyuki Mizuhata, Nobuhiro Takeda,Takahiro Sasamori, and Norihiro Tokitoh

422 Morphology Control of Organic–InorganicHybrid Mesoporous Silica by MicrowaveHeating

2.7 mµ

Dong-Jun Kim, Jin-Seong Chung, Wha-SeungAhn, Gyoung-Won Kang, and Won-Jo Cheong

424 Rhodium-Catalyzed Acylation of Vinylsi-lanes with Acid Anhydrides: Application tothe Transformation of �-Acyloxy Vinylsi-lanes to Unsymmetrical 1,2-Diketones

Ph(CH2)2 SiMe2R'Ph(CH2)2 R

O

Ph(CH2)2 RhI Ph(CH2)2 Rh R

O

X

(RCO)2O

(RCO)2O

RhIX

III

– XSiMe2R' – RhIX

cat. [RhCl(CO)2]2

Y = H, OCOPhR' = Me, Ph

80-90 °C

X = Cl, OCOR

Y Y

Y Y

Motoki Yamane, Kazuyoshi Uera, and KoichiNarasaka

426 Molecular Orientation Control in Amphi-philic �-Helical Copolypeptide Monolayerat Air/Water Interface

pH control

Compression

Compression

airwater

high pH

low pH

high pH

Hidenori Yokoi and Takatoshi Kinoshita

428 Magnetic Trapping of CocoreCoOshell Nano-particles Produced by Gas Phase Reaction

5nm 2 µm 3 µm

Magnetic trapping of the two kinds of CocoreCoOshell nanoparticles.

Seung H. Huh and Atsushi Nakajima



430 The Cyclo[(disilanylene)(butadiyne)]s[(i-Pr)2Si(i-Pr)2SiC�CC�C]n (n ¼ 2–4) Cl(i-Pr)2Si–Si(i-Pr)2ClBuLi

Cl2C C

Cl

C

Cl

CCl2Et2O, –78 °C rt

[LiC CC CLi]Et2O, –78 °C rt

1

+

2

+

3

(i-Pr)2Si Si(i-Pr)2

(i-Pr)2Si Si(i-Pr)2

(i-Pr)2Si

(i-Pr)2Si Si(i-Pr)2

(i-Pr)2Si

Si(i-Pr)2

Si(i-Pr)2

(i-Pr)2Si Si(i-Pr)2

(i-Pr)2Si Si(i-Pr)2

Si(i-Pr)2

Si(i-Pr)2(i-Pr)2Si

(i-Pr)2Si

Keisuke Negishi, Masafumi Unno, andHideyuki Matsumoto

432 Novel Soluble and Thermally Stable Pery-lene Dye with Two [60] Fullerene Units

O O

O O

NN

O

O

O

O OO

(CH2)5 (CH2)5

O

CHO

O

CHO

O O

O O

NN

O

O

O

O OO

(CH2)5 (CH2)5

O O

NN

CH3 CH3

C60, N-methylglycine

chlorobenzene, reflux

1 2

Jianli Hua, Fanshun Meng, Fang Ding, and HeTian

434 Formation of Luminescent CdTe–SilicaNanoparticles through an Inverse Micro-emulsion Technique

10nm

CdTe

CdTe

SiO2

SiO2

SiO2

SiO2CdTe

S. Tamil Selvan, Chunliang Li, Masanori Ando,and Norio Murase

436 Higher-order Conformations of DNA AreUseful as Templates to Create Various Su-perstructural Poly(pyrrole) Morphologies

Supercoiled poly(pyrrole) Rod-like poly(pyrrole) Circular poly(pyrrole)

Topoisomerase IIonic strength

Ah-Hyun Bae, Tsukasa Hatano, MunenoriNumata, Masayuki Takeuchi, and Seiji Shinkai

438 A Facile Approach to 2-CF3-Substituted Sev-en-membered Oxacycles via StereoselectivePreparation and Cope Rearrangement of2-CF3-cis-2,3-Bis(alkenyl)oxiranes OE CF3

R2

R1R4

R3

O CF3E

R4

R3 R2

R1CCl4

R1

R2

Cl

Cl

CF3HOLi

R4

R3

O CF3E

R4

R3 R2

R1

O CF3E

R4

R3 R2

R1

1) 3

2) 3 LiTMP3) E+

∆

Masaki Shimizu, Takuya Fujimoto, Xinyu Liu,and Tamejiro Hiyama



440 Synthesis of Model Compound Containingan Indole Spiro-�-lactam Moiety with Vinyl-chloride in Chartellines

Br

BrBr

NNH

NBr

Cl

N

O

NMe

N

OCl

Ph

O

chartelline Amodel compound

Toshio Nishikawa, Shigeo Kajii, and MinoruIsobe

442 A Cationic Diruthenium Amidinate, [(�5-C5Me5)Ru(�2- i -PrN=C(Me)Ni-Pr)Ru(�5-C5Me5)]

þ, as an Efficient Catalyst for theAtom-Transfer Radical Reactions

N

XCl2C

NOZ

O

Z

ClClX

cat(10 mol %)

25 °CRu

NN

Mei-Pr

i-Pr

Ru

cat

X = Cl, HZ = Bn, Ts, Ph, Allyl

Yukihiro Motoyama, Mitsuru Gondo, SatoshiMasuda, Yuya Iwashita, and Hideo Nagashima

444 An Improved Synthesis of Chacotriose

OAcO

AcO OAc

CH3

O

OOAc

OAc

OAc

OAcO

AcO OAc

CH3

O

Vincent Lequart, Gerard Goethals, JosephBanoub, Pierre Villa, and Patrick Martin

446 Syntheses and Structure of a Novel LayeredLanthanide–Zinc Coordination Polymer:[LaZn(HIDA)(IDA)2�0.5H2O]n

La ions are lined through sharing the O atomsof IDA ligands to form a 1-D zig-zag chain, andoctahedron-coordinated Zn ions are beside the1-D chain, alternately. And then HIDA ligandshowing an unusual protonated helix bridgingmode, link the 1-D zig-zag inorganic chain into2-D layered structure.

Hongbin Xu, Yahui Zhao, Zhongmin Su,Guanghua Li, Yue Ma, Kuizhan Shao, DongxiaZhu, Hengjun Zhang, and Shumei Yue

448 Two-Photon Absorption Cross-Sections ofFluorene Derivatives with Cationic Substitu-ents

Fluorene derivatives with anionic substituent (2 and 4) were newly synthesized and their two-photon absorption (TPA) cross- sections were examined. As a result, much larger TPA cross- sections were observed for compounds 2 and 4 than those observed for the compounds 1 and 3.

N

C2H5 C2H5

NN

C2H5 C2H5

N CH3

ClO4

C2H5 C2H5

NN

C2H5 C2H5

NNH3C

CH3

2ClO4

1 2

3 4

Jun Kawamata, Masaharu Akiba, TakeharuTani, Akinori Harada, and Yoshio Inagaki



450 Unprecedented Pendant Group Exchange ofa Porphyrinato Platinum(II) in Benzonitrile

a CH3COONa, K2[PtCl4], CH3COOH/Ph-Clb K2[PtCl4], Ph-CN

Naoko Araki, Makoto Obata, Akio Ichimura,Yuji Mikata, and Shigenobu Yano

452 Synthesis and Physical Nature of FluorescentPhotoaffinity Probe for the Bioorganic Stud-ies on Tautomycin, a Protein PhosphataseType 1 Selective Inhibitor N

SO O

HNNH

O

OO

OH OH

OMeH

O

OOH HO O

N

O

O

N O

O

HN

O

Fluorescent photoaffinity probe

O

OH OH

OMeH

O

OOH HO

O

O

O

O

Tautomycin

O

Masakuni Kurono and Minoru Isobe

454 Immobilization of Gold Nanorods on theGlass Substrate by the Electrostatic Interac-tions for Localized Plasmon Sensing air

water

acetone

ethanol

cyclohexane

chloroform 1.447

1.4251.361

1.3331.359

1.000

peak position/nm

762

805

807

806

818

841

refractive index (nd20)solvent

The outermost PDDA layer was effective to prevent the lateral diffusion of gold NRson the PSS layer. The longitudinal SP band of the immobilized gold NRs without sub-stantial aggregation could sense the refractive index of the surrounding medium.

Glass

PDDA Gold NR

PSS

Yasuro Niidome, Hironobu Takahashi, ShinjiUrakawa, Koji Nishioka, and Sunao Yamada

456 Photochromism of Diarylethene-cappedGold Nanoparticles

F2F2

F2

S SMe

Me

O SH

= Me MeAu

Kenji Matsuda, Masumi Ikeda, and MasahiroIrie

458 Synthesis and Characterization of the FirstOrganically Templated Layered CeriumPhosphate Fluoride: [(CH2)2(NH3)2]0:5-[CeIVF3(HPO4)]

By careful control of the reactionconditions, especially organic amine andsystem acidity, the first organicallytemplated layered cerium phosphate flouridehas been hydrothermally synthesized. Itsunique layered structure is based on anetwork of novel polyhedral CeO3F5 andtetrahedral PO4. The structure consists ofmacroanionic [CeIVF3(HPO4)]

- sheetsseparated by diprotonated ethylene-diammonium cations.

PO4

[(CH2)2(NH3)2]2+

CeO3F5

Ranbo Yu, Dan Wang, Shintaro Ishiwata,Takashi Saito, Masaki Azuma, Mikio Takano,Yunfa Chen, and Jinghai Li



460 Synthesis and Photocytotoxicity of NitroxylRadical-substituted Porphyrin

i

ii

1 R =

2 R =

3 R =

iii4 R =

NO

HNCO

H

NO2

NH2

N

NH N

HN

Ph

Ph

Ph

R

mono-nitroxyl radical-substituted tetraphenylporphyrinJian Wu, Weimin Shi, and Di Wu

462 Synthesis of 3,3,6,6-Tetraaryl-1,2-Dioxanesvia TiO2-catalyzed Photooxygenation of 1,1-Diarylethenes in the Presence of Mg(ClO4)2

O O

Ar

ArAr

ArH H

Ar

Ar

Ar

Ar

+

O2CH3CNAr

Ar

O O

Ar

ArAr

Ar

O2CH3CN

TiO2, Mg(ClO4)2+

h (> 280 nm)

TiO2, Mg(ClO4)2

h (> 280 nm)

ν

ν

Hajime Maeda, Hisayuki Miyamoto, andKazuhiko Mizuno

464 Synthesis of cis-2-Fluorocyclopropylamineby Stereoselective Cyclopropanation UnderPhase-transfer Conditions

Jun-ichi Matsuo, Yu-ichirou Tani, andYu-ichirou Hayakawa

466 Solid State 31P MAS NMR Detection ofHydrogen-bonded Phosphate Polymer inCalcium–Phosphate Composites

Akira Onoda, Mototsugu Doi, KazuyukiTakahashi, Taka-aki Okamura, HitoshiYamamoto, and Norikazu Ueyama

468 Novel Reversed Chain Modified Oligopepti-des via Sequential �-N-Mitsunobu Conden-sation of a Functionalized C-glycoside

Ph

ONH

NH

HO OH

HN

O

HN

ONH

HN

NH

MeOOC

O

O

COOMe

OH16O

ORBzO

OBzBzO

O

John J. Turner, Friso D. Sikkema, KeesErkelens, Gijs A. van der Marel, Herman S.Overkleeft, Jacques H. van Boom, and MarkOverhand



470 Enhanced Two-photon Properties of Tri-branched Styryl Derivatives Based on 1,3,5-Triazine

N N

N

CH

CH CH N

OCH3

N

H3CO

CH N

OCH3

T03

CH CH

Fanshun Meng, Bo Li, Shixiong Qian,Kongchang Chen, and He Tian

472 Novel Acidic Ionic Liquids Catalytic Systemsfor Friedel–Crafts Alkylation of AromaticCompounds with Alkenes

SO2XCF3SO3

-

(CH2)n

1a, n = 3, X = Cl, 1b, n = 4, X = Cl2a, n = 3, X = OH, 2b, n = 4, X = OH

R

+ Alkene

ionic liquid orionic liquid + metal triflate

alkylbenzene

Kun Qiao and Chiaki Yokoyama

474 Microwave Polyol Synthesis and Characteri-zations of Carbon-supported Pt and RuNanoparticles

Carbon-supported Pt and Ru nanoparticles were prepared by microwave polyol process. Pt and Ru particlesprepared as such have uniform shapes and sizes, and well dispersed on the carbon surface.

Weixiang Chen, Jie Zhao, Jim Yang Lee, andZhaolin Liu

476 Green Protocol for the Synthesis of vicinal-Halohydrins from Oxiranes Using the[Bmim]PF6/LiX Reagent System

OOH

X

NN

+rt

LiX

X = Cl, Br, I

+ PF6-

J. S. Yadav, B. V. S. Reddy, Ch. SrinivasReddy, and K. Rajasekhar

478 Methanol Electrooxidation on Carbon-Supported Pt3Ru2Sn Ternary Catalyst Methanol oxidation currents with time

on the carbon-supported Pt alloycatalysts at room temperature(potential: 0.45V vs. RHE, electrolyte:0.1M H2SO4, 0.5M methanol, loadingweight of catalyst: based on same21µgPt /cm2).

Time / min

0 10

Spe

cific

cur

rent

den

sity

/ µA

cm

-2

0

5

10

15

20

Pt/CPt3Sn/C

PtRu/CPt2RuSn/C

Pt3Ru2Sn/C

Pt5Ru4Sn/C

20 30 40 50 60

Taeyoon Kim, Masashi Takahashi, MasayukiNagai, and Koichi Kobayashi

chemistry letters · shin-ya kishioka and akifumi yamada. c-50 chemistry letters vol.33, no.4...

Documents