2002 Azetidine derivatives

Azetidine derivativesR 0045 Highly Enantioselective Photocyclization of 1Alkyl-2-pyridones to β-Lactams in

Inclusion Crystals with Optically Active Host Compounds. — The 1:1 and 1:2 in-clusion complexes, obtained from 2-alkyl-1-pyridones and optically active hosts MSC or MPC in the solid state, undergo intramolecular [2 + 2] photocyclization to give bi-cyclic β-lactams with high enantioselectivities. The 2:1 inclusion complexes, derived from pyridones (Ia) and (Ib) and host compound BDB, give upon irradiation [4 + 4] dimers (V). — (TANAKA*, K.; FUJIWARA, T.; URBANCZYK-LIPKOWSKA, Z.; Org. Lett. 4 (2002) 19, 3255-3257; Dep. Appl. Chem., Fac. Eng., Ehime Univ., Matsuyama, Ehime 790, Japan; Eng.) — Klein

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