Palladium mediated synthesis of conjugated E or Z enones and unsymmetrical divinyl ketones. one-pot preparation of isoegomaketone
作者:N. Jabri、A. Alexakis、J.F. Normant
DOI:10.1016/s0040-4020(01)87356-7
日期:1986.1
The palladium (o) catalyzed coupling of acyl halides or anhydrides with alkenyl copper reagents furnishes α,β ethylenic ketones and α,β-α,β' diethylenic ketones in high yield. The substitution pattern of the alkenyl copper reagent, directly obtained by carbocupration of alkynes, is fully retained. Anhydrides of Z-ethylenic acids also retain their Z stereochemistry. β-halogeno-vinyl ketones react under
酰基卤或酸酐与链烯基铜试剂的钯(o)催化偶联可高收率提供α,β乙烯酮和α,β-α,β'二乙烯酮。通过炔烃的羰基化直接获得的烯基铜试剂的取代模式被完全保留。Z-烯酸的酸酐也保留其Z立体化学。β-卤代乙烯基酮在上述条件下反应,得到α,β-γ,δ二烯酮。报道了一种有效的一锅法合成Z或ε异麦角蛋白酮的方法。