Organomanganese (II) reagents XXIII: Manganese-catalyzed acylation of organomagnesium compounds by car☐ylic acid chlorides
作者:Ge´rard Cahiez、Blandine Laboue
DOI:10.1016/s0040-4039(00)60104-1
日期:1992.7
reagents react with car☐ylic chlorides, in THF between 0 and 10°C, to give the corresponding ketones in highyields. The scope of the reaction is very large; alkyl, alkenyl and aryl magnesium reagents have been used successfully. The selectivity of the reaction allows to prepare various fonctionalized ketones from car☐ylicacid chlorides bearing a functional group (Cl, Br, ester nitrile and even a ketone)
在催化量的氯化锰(3%MnCl 4 Li 2)的存在下,有机镁试剂在0至10°C之间的THF中与羧基氯化物反应,以高收率得到相应的酮。反应范围非常大。烷基,烯基和芳基镁试剂已成功使用。反应的选择性允许从带有官能团(Cl,Br,酯腈甚至是酮)的汽车☐酰氯制备各种功能化的酮。
Organomanganese (II) reagents XIX. Acylation of organomanganese chlorides by carboxylic acid chlorides in THF: A clear improvement in the field of the preparation of ketones from organomanganese compounds
作者:Gérard Cahiez、Blandine Laboue
DOI:10.1016/s0040-4039(00)70699-x
日期:1989.1
Organomanganese chloride reagents react with carboxylic acid chlorides, in THF, to give the corresponding ketones in excellent yields. The reaction is of broad scope, it is very interesting from practical and economical point of view since organomanganese chlorides (in THF) are the most stable and cheap organomanganese reagents. With methyl, aryl, alkenyl and s- or t-alkylmanganese chlorides, the acylation
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.
Reaction of dialkylchloroboranes with lithium aldimines. A new method for synthesis of unsymmetrical ketones via organoboranes
作者:Yoshinori Yamamoto、Kaoru Kondo、Ichiro Moritani
DOI:10.1016/s0040-4039(01)82334-0
日期:1974.1
CAHIEZ, GERARD;LABOUE, BLANDINE, TETRAHEDRON LETT., 30,(1989) N2, C. 7369-7372