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 C7methylenes), 2.0-2.6 (3H, m, C5 methine and C3 methylene), 2.6-3.0 (1H, 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 1should 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...amidine13functionalities...1.”
Additions and Corrections
Pierre J. De Clercq. Systematic Conformational Analysis. General Method for Rapid Conformational Evaluation. Its Application to the Hydroazulene System. Page 669. Figure 1was inadvertently published upside down. The correct orientation of the figure is as shown below.
