Several N-phenylcycloheximide analogues were prepared by TiCl4-promoted aldol condensation between trimethylsilyl enol ethers of cyclic ketones and (N-phenylglutarimide)-β-acetaldehyde. Favored stereoisomers were isolated in several instances and identified from nuclear magnetic resonance data. Only for the analogue from 4-tert-butylcyclohexanone was it possible to obtain both erythro and threo isomers
通过 TiCl4 促进的环酮的三甲基甲
硅烷基烯醇醚和 (N-苯基戊二
酰亚胺)-β-
乙醛之间的羟醛缩合反应制备了几种 N-苯基环己
酰亚胺类似物。在几个实例中分离出偏好的立体异构体,并从核磁共振数据中进行鉴定。只有来自
4-叔丁基环己酮的类似物才有可能同时获得赤型和苏型异构体。β-羟基酮系统在 PtO2 上的催化还原得到具有轴环羟基的二氢环己
酰亚胺类似物。冰川 HOAc 的减少被认为促进了戊二
酰亚胺环的裂变,形成了内酯酰胺,并且在一些情况下,伴随着苯环还原为环己基。