Synthetic applications of 2-cyanopiperidines. Model studies in the synthesis of bridged indole alkaloids
作者:Joan Bosch、Miguel Feliz、M.-Lluisa Bennasar
DOI:10.1016/s0040-4020(01)82427-3
日期:1984.1
Acid cyclization of 4-(indol-1- and -3-ylmethyl)-2-cyanopiperidines 5̃ led to the bridged tetracyclic indole- systems 1̃ and 2̃. The required 2-cyanopiperidines 5̃ were prepared by catalytic hydrogenation of 2-cyano-1,2,3,6-tetrahydropyridines 4̃ and by DIBAL reduction of lactams 7̃ followed by cyanide ion addition to the intermediate enamine.
4-(吲哚-1-和-3-基甲基)-2-氰基哌啶5′的酸环化导致桥联的四环吲哚-体系1′和2′。所需的2-氰基哌啶5′是通过2-氰基-1,2,3,6-四氢吡啶4′的催化加氢和内酰胺7′的DIBAL还原,然后将氰化物离子加到中间体烯胺中而制得的。