作者:Charles B. de Koning、Joseph P. Michael、Rakhi Pathak、Willem A.L. van Otterlo
DOI:10.1016/j.tetlet.2003.12.020
日期:2004.2
The synthesis of fused isoquinolines from N-benzyl protected indoles and pyrroles is described. For example, treatment of t-butyl-2-(2-formyl-3,4-dihydro-1-naphthalenyl)-3-methyl-1H-indole-1-carboxylate with KOBut in DMF provided 14-methyl-8-phenylbenzo[h]indolo[2,1-a]isoquinoline in good yield. Analogous N-benzylpyrrole precursors could similarly be cyclized to give pyrrolo[2,1-a]isoquinolines.
描述了由N-苄基保护的吲哚和吡咯合成稠合的异喹啉。例如,用DMF中的KOBu t处理叔丁基-2-(2-甲酰基-3,4-二氢-1-萘基)-3-甲基-1 H-吲哚-1-羧酸酯提供了14-甲基-8 -苯基苯并[ h ]吲哚[2,1- a ]异喹啉,收率高。类似的N-苄基吡咯前体可以类似地环化得到吡咯并[2,1- a ]异喹啉。