Thermal oligomerisation of aryl isocyanides: formation of pyrazino[1,2-a:4,5-a']diindoles and indigo diarylimines |
| |
| Authors: | Boeyens Jan C A Cook Leanne M Ding Yunxiang Fernandes Manuel A Reid David H |
| |
| Institution: | School of Chemistry, University of the Witwatersrand, Private Bag 3, WITS2050, Johannesburg, South Africa. |
| |
| Abstract: | The aryl isocyanides 1-4 are converted at 150 degrees C into the hexameric pyrazino1,2-a:4,5-a']diindoles 15-19. 4-Fluorophenyl isocyanide, when heated at 135 degrees C, gave the hexamer 19 and the tetrameric indigo di-arylimine 9, and when kept at ambient temperature gave mainly the tetramer 9 in low yield. The structures of the hexamer 19 and the tetramer 9 were established by X-ray crystallography. Mechanisms are proposed for the oligomerisation reactions. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
