Copper-Catalyzed Bis(methoxycarbonyl)carbene Reactions of α,β-Unsaturated Carboxamides
作者:Gökçe Merey、Olcay Anaç
DOI:10.1002/hlca.201000384
日期:2011.6
The [Cu(acac)2]‐catalyzed reactions of α,β‐unsaturated carboxamides with dimethyl diazomalonate yielded dihydrofuran derivatives by a 1,5‐electrocyclic reaction at C(β), and butadiene derivatives by carbene addition reaction at C(α) (Schemes 4 and 5; Table). Phenyl substituents at the N‐atom of the amides seem to be effective on the reaction pathways (Table).
的[铜(ACAC)2 ]催化的反应的α,β不饱和羧酰胺与二甲diazomalonate在C(产生由1,5-电环化反应二氢呋喃衍生物β),和丁二烯衍生物在C(通过卡宾的加成反应α) (方案4和5;表)。酰胺N-原子上的苯基取代基似乎对反应路径有效(表)。