Synthesis of 2-Cycloalkenones (Parts of 1,4-Diacyl-1,3-butadiene Systems) and of a Heterocyclic Analogue by Metal-Catalyzed Decomposition of 2-Diazoacylfurans
作者:Ernest Wenkert、Ming Guo、Ferdinando Pizzo、Kishore Ramachandran
DOI:10.1002/hlca.19870700524
日期:1987.8.12
and diazoketo functions leads to the formation of a hydroindenone and pyrrolone, respectively. Replacement of the diazomethylketo terminus by an α-diazoethylketo system or a α-diazo-β-keto-ester function produces 2-substituted 2-cycloalkenones. A furan with a C4, diazo-methylketo-terminating side-chain at C(3) is described to be transformed into a 4-formylmethylidene-2-cyclohe-xenone.
在呋喃中具有重链终止于重氮甲基酮基团的各种长度的C(2)的呋喃显示经历Rh 2(OAc)4催化的呋喃分解,并分别产生2-环戊烯酮,2-环己烯酮和2-环庚烯酮其烯属的C(β)连接有丙烯醛单元。在呋喃和重氮酮官能团之间插入环己烷或甲基氨基亚甲基部分分别导致形成氢化茚酮和吡咯烷酮。用α-重氮乙基酮体系或α-重氮-β-酮酯官能团取代重氮甲基酮末端可产生2-取代的2-环烯酮。描述了在C(3)处带有C 4重氮-甲基酮终止侧链的呋喃可转化为4-甲酰基亚甲基-2-环己烯酮。