Controlled Reactions of 2,3-Allenoates with a 1,3-Diketone Catalyst Effect
作者:Zhao Fang、Chunling Fu、Shengming Ma
DOI:10.1002/ejoc.201101852
日期:2012.5
Two types of reactions of 2,3-allenoates with 1,3-diketones under different reaction conditions are described: under palladium catalysis, the relatively electron-rich C=C bonds are attacked to afford ethyl (2E)-4-acyl-2-alkyl-4-aryl-6-oxohept-2-enoates exclusively with dicyclohexyl(2,4,6-trimethoxyphenyl)phosphane as the ligand; under Cu(OAc)2 catalysis, 4-[R–C(=O)–]-(LB-Phos) 3,5-dialkyl-3-(2-oxo