A catalytic role of Cu(II) for conjugate addition of grignard reagents. A completely different behavior from organocuprates.
作者:Youji Aoki、Isao Kuwajima
DOI:10.1016/s0040-4039(00)88514-7
日期:1990.1
Different from lithium dialkylcuprates, Cu(II) catalyzed conjugate addition of Grignard reagents to allylic esters of α,β-unsaturated carboxylates has been effected in the presence of TMS-Cl, and the resulting allyl silyl keteneacetals further undergo rearrangement to afford 2-allyl 3-alkyl carboxylic acids in good yields.
与二烷基铜酸锂不同,在TMS-Cl的存在下,Cu(II)催化了格氏试剂向α,β-不饱和羧酸酯的烯丙基酯的共轭加成反应,所得的烯丙基甲硅烷基烯酮缩醛进一步进行重排生成2-烯丙基3-烷基羧酸产率高。