An efficient approach to azirino and pyrrolo-fused dibenzazepines. Conformations of substituted dibenzo[c,f]pyrrolo[1,2-a]azepines
作者:Alexander F. Khlebnikov、Mikhail S. Novikov、Maria V. Golovkina、Petr P. Petrovskii、Alexander S. Konev、Dmitry S. Yufit、Helen Stoeckli-Evans
DOI:10.1039/c1ob05081h
日期:——
dipolarophiles and fullerene C60, leads to derivatives of dibenzo[c,f]pyrrolo[1,2-a]azepine. The reaction proceeds with complete stereoselectivity via cycloaddition of only W-ylide, which due to the high barrier does not undergo E,Z-isomerization under the reaction conditions. It was found that 2,3,9,13b-tetrahydro-1H-dibenzo[c,f]pyrrolo[1,2-a]azepine systems can exist in conformations of two types depending
描述了一种将天星蛋白融合的杂环的有效方法。通过多米诺序列合成反式-1-芳基-7,11b-二氢-1 H-叠氮基[1,2- a ]二苯并[ c,f ]氮杂:宝石的异构化-二氯氮丙啶–分子内Friedel – SnCl 4催化的束缚苯环的Crafts酰化反应以及随后的氢化物诱导的分子内环化反应。通过加热这些氮丙啶产生的二苯并ze庚因基叶酸酯与活化的C C,C C双极性亲和物和富勒烯C 60的环加成反应会生成以下化合物的衍生物二苯并[ c,f ]吡咯并[1,2- a ]氮杂。该反应仅通过W-内酯的环加成而以完全的立体选择性进行,该W-内酯由于高的势垒而在反应条件下不经历E,Z-异构化。已经发现,取决于β中吡咯烷碳上的取代基,2,3,9,13b-四氢-1 H-二苯并[ c,f ]吡咯并[1,2- a ]氮杂系统可以以两种类型的构象存在。相对于氮的位置。通过DFT计算在B3LYP / 6-31G(d)
Thermal reactions of<i>N</i>-alkyl-2-benzylaniline and<i>N</i>-alkyl-<i>N</i>′-phenyl-<i>o</i>-phenylenediamine: An unusual route to 2-phenylindole and 2-phenylbenzimidazole
Thermal cyclization reactions of N-alkyl-2-benzylaniline 1a-d and N-alkyl-N′-phenyl-o-phenylenediamine 2a-b were carried out expecting to get seven-membered heterocyclic compounds. However, the results show that aside from the formation of the normally expected six-membered ring products of acridine 5, anthracene 6, and phenazine 8, thermal cyclization of N-alkyl-2-benzylaniline and N-alkyl-N′-phe