Compounds with bridgehead nitrogen. Part 49. The synthesis and stereochemistry of perhydropyrido[3,2,1-j,k][3,l]benzoxazepines and of r-3a,t-11a,c-14a, t-14b, t-22a,t-22b-perhydrodiquino[1,8a,8-c,d:1′,8a′,8′-j,k][1,8,3,10]dioxadiazacyclotetradecine
作者:Trevor A. Crabb、Philip A. Jupp
DOI:10.1039/p19850000913
日期:——
shifts of the conformationally locked isomers with those of perhydropyrido[1,2-c][1,3]oxazepine showed different average perhydro-1,3-oxazepine ring conformations in the various structures so that an estimate of the position of conformational equilibrium (CDCl3, solution) of the bicyclic compound from this data could not be made. The 13C n.m.r. spectrum of perhydropyrido[1,2-c][1,3]oxazepine in CDCl3—CFCl3
非对映异构2-十氢喹啉-8- ylethanols与甲醛的环闭合,得到ř -4a,Ç -7a,吨-11a-,- [R -4a,吨-7a,吨-11A,和- [R -4a,Ç -7a,Ç -11A-全氢化吡啶并[3,2,1 Ĵ,ķ ] [3,1] benzoxazepines但是,代替第四异构体的二聚体,- [R -3a,吨-11A,ç -14A,吨-14b,吨到22A ,t -22b-perhydrodiquino [1,8a,8- c,d:1',8a',8'- j,k得到[1,8,3,10]二恶二氮杂环十四癸。构象锁定的异构体与全氢吡啶并[1,2- c ] [1,3]奥氮平的13 C nmr位移比较表明,在各种结构中平均过氢-1,3-奥氮平的环构象不同,因此对根据该数据无法确定双环化合物的构象平衡(CDCl 3,溶液)的位置。然而,全氢吡啶并[1,2- c ] [1,3]氧氮杂in在CDCl