Intramolecular cyanoamidation of unsaturated cyanoformamides catalyzed by palladium: an efficient synthesis of multi-functionalized lactams
作者:Yusuke Kobayashi、Haruhi Kamisaki、Hiroshi Takeda、Yoshizumi Yasui、Reiko Yanada、Yoshiji Takemoto
DOI:10.1016/j.tet.2007.01.060
日期:2007.4
The Pd(0)-catalyzed intramolecular cyanoamidation of several unsaturated cyanoformamides with alkenyl, allenyl, and alkynyl groups was investigated. In the cases of alkynyl and 1,1-disubstituted alkenyl cyanoformamides, the Pd(0)-catalyzed C–CN activation and subsequent insertion reaction proceeded smoothly and gave the corresponding lactams bearing a cyano group at the β-position in good yields. The
研究了Pd(0)催化的几种不饱和氰基甲酰胺与烯基,烯基和炔基的分子内氰基酰胺化反应。在炔基和1,1-二取代的烯基氰基甲酰胺的情况下,Pd(0)催化的C-CN活化和随后的插入反应进行得很顺利,并以高收率得到了相应的内酰胺在β位带有氰基。还讨论了反应机理。