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
描述了 2,3-烯丙酸酯与 1,3-二酮在不同反应条件下的两种反应:在钯催化下,相对富电子的 C=C 键被攻击得到乙基 (2E)-4-acyl-2 -烷基-4-芳基-6-oxohept-2-enoates 仅以二环己基(2,4,6-三甲氧基苯基)膦作为配体;在 Cu(OAc)2 催化下,4-[R–C(=O)–]-(LB-Phos) 3,5-dialkyl-3-(2-oxo-2-arylethyl)furan-2(3H)-一种产物出乎意料地通过缺电子 C=C 键的分子内反应形成。