Compounds with bridgehead nitrogen. 42—1H NMR and stereochemistry of isomeric 6a-methylperhydroindolo[3,2,1-i,j]benzoxazines and the position of conformational equilibrium in perhydropyrrolo[1,2-c][1,3]oxazine
作者:Trevor A. Crabb、Roger F. Newton、Janet Rouse
DOI:10.1002/mrc.1270200209
日期:1982.10
AbstractThe 1H NMR parameters of the NCH2O protons in the spectrum of perhydropyrrolo[1,2‐c][1,3]oxazine show its existence in solution at room temperature in the O‐inside cis‐fused conformation. rel‐(3aS,6aS,6bR,10aS,11aS)‐6a‐Methylperhydroindolo[3,2,1‐i,j]benzoxazine and rel‐(3aS,6aS,6bS,10aR,11aS)‐6a‐methylperhydroindolo[3,2,1‐i,j]benzoxazine are shown to adopt cis‐ and trans‐fused conformations, respectively, for the corresponding bicyclic moiety.