2604 J . Org. Chem., Vol. 46, No. 12, 1981

H. K. Hall, Jr.,* R. G. Shaw, Jr., and A. Deutschmann. Anti-Bredt Molecules. 2. l-Azabicyclo[3.3.1]nonan-2-one, a New Bicyclic Lactam Containing Bridgehead Nitrogen.

Page 3722. For l-azabicyclo[3.3.1]nonan-2-one, a revised NMR assignment is suggested by comparison with those of the recently synthesized bicyclic urethane (H. K. Hall, Jr., and A. El-Shekiel, J . Org. Chem., 45, 5325 (1980)) and urea (H. K. Hall, Jr., 0. E. Ekuchukwu, A. Deutschmann, Jr., and C. Rose, Polym. Bull., in press). The revised assignment is as follows: ‘H NMR (CDC13) b 1.C-2.0 (6 H, br m, C4, C6, and C7 methylenes), 2.0-2.6 (3 H, m, C5 methine and C3 methylene), 2.6-3.0 (1 H, m, axial H on Cs), 3.0-3.5 (2 H, m, C9 methylene), 4.1 (I H, br d, equatorial H on CJ.

Vol. 46, 1981

Bruce E. Maryanoff,* David F. McComeey, and Samuel 0. Nortey. Properties of Bis(trifluoroacetoxy)borane as a Reducing Agent of Organic Compounds.

Page 356. Column 1. An error was made in the assignment of footnotes 12a, 12b, and 13. The first sentence in paragraph 1 should read as follows: “In our preliminary ... azepindole’” (2) to dihydro derivative 3.12b” The second sentence in paragraph 2 should read as follows: “This topic ... amidine13 functionaliti es... 1.”

Additions and Corrections

Pierre J. De Clercq. Systematic Conformational Analysis. General Method for Rapid Conformational Evaluation. Its Ap- plication to the Hydroazulene System.

Page 669. Figure 1 was inadvertently published upside down. The correct orientation of the figure is as shown below.