Conformation Analyses, Dynamic Behavior, and Amide Bond Distortions of Medium-sized Heterocycles. 2. Partially and Fully Reduced 1-Benzazocines, Benzazonines, and Benzazecines
作者:Maryiam Qadir、Jonathan Cobb、Peter W. Sheldrake、Neil Whittall、Andrew J. P. White、King Kuok (Mimi) Hii、Peter N. Horton、Michael B. Hursthouse
DOI:10.1021/jo048117j
日期:2005.3.1
forms of benzo-fused eight- to ten-membered nitrogen heterocycles (1-benzazecines, 1-benzazonines and 1-benzazecines) have been prepared. Conformational features, transannular distances and dynamic behavior were studied using X-ray crystallography and VT NMR spectroscopy. The amide moiety in the nine-membered benzazonine ring 5b favors N-pyramidization, whereas the ten-membered benzazecine 5c adopts