Cu-Catalyzed Alkylation of Grignard Reagents: A New Efficient Procedure
摘要:
The presence of NMP (4-9 equiv.) clearly improves the yield and the chemoselectivity of the Cu-catalyzed alkylation of organomagnesium reagents. Thus, secondary and tertiary alkylmagnesium chlorides were used successfully for the first time in such a reaction and ester, amide, nitrile or keto groups are tolerated. The procedure is cheap, environmentally friendly and very easy to carry out (1-3% Li2CuCl4 or CuCl, THF, 20 degrees C). It is an interesting alternative to the classical alkylation of organocuprates reagents. (C) 2000 Published by Elsevier Science Ltd.
Glick, Journal of Biological Chemistry, 1941, vol. 137, p. 358
作者:Glick
DOI:——
日期:——
MAMISHOV A. X.; XOLILOV X. D., AZEHRB. KIMJA ZH., AZERB. XIM. ZH., 1980, HO 2, 58-62
作者:MAMISHOV A. X.、 XOLILOV X. D.
DOI:——
日期:——
US3970678A
申请人:——
公开号:US3970678A
公开(公告)日:1976-07-20
A New Synthetic Method for Haloalkyl Carboxylic Esters from the Radical Ring Cleavage of Cyclic Acetals with Haloform
作者:Lin Hai-xia、Xu Liang-heng、Huang Nai-ju
DOI:10.1080/00397919708005032
日期:1997.1
Abstract A one-pot reaction of cyclicacetals with haloform catalyzed by AIBN(2,2′-azobisisobutyronitrile) provides a novel convenient way to prepare directly haloalkyl carboxylic esters in good yields.
The presence of NMP (4-9 equiv.) clearly improves the yield and the chemoselectivity of the Cu-catalyzed alkylation of organomagnesium reagents. Thus, secondary and tertiary alkylmagnesium chlorides were used successfully for the first time in such a reaction and ester, amide, nitrile or keto groups are tolerated. The procedure is cheap, environmentally friendly and very easy to carry out (1-3% Li2CuCl4 or CuCl, THF, 20 degrees C). It is an interesting alternative to the classical alkylation of organocuprates reagents. (C) 2000 Published by Elsevier Science Ltd.