Copper-catalyzed conjugate addition of grignard reagents to isopropylidene alkylidenemalonates
作者:Xian Huang、Cheng-Chu Chan、Qian-Li Wu
DOI:10.1016/s0040-4039(00)97536-1
日期:1982.1
A new method for the synthesis of isopropylidene alkylmalonates involving conjugateaddition of Grignardreagents to isopropylidene alkylidenemalonates was developed.
开发了一种新的合成异亚丙基烷基丙二酸酯的方法,该方法包括将格氏试剂共轭加到异亚丙基烷基丙二酸酯。
Fe(HSO 4 ) 3 : An efficient, heterogeneous and reusable catalyst for C-alkylation of β-dicarbonyl compounds
Fe(HSO4)3(FHS) was used as an efficient catalyst for the heterogeneous addition of a series of benzylic and allylic alcohols to various β-dicarbonyl compounds, which afforded moderate to excellent yields of C-alkylated products in 1,2-dichloroethane. In comparison with the previous methods, the present research surprisingly exhibited higher reaction yields without formation of any by-products which could be formed by self-condensation of alcohols. Moreover, the catalyst can be readily recovered and reused up to five times with almost maintained reactivity and yields.