DIKETENE AS A 3-BUTENOIC ACID SYNTHON IN TRANSITION METAL-CATALYZED ALKYLATION OF A TRIMETHYLSILYLMETHYL GRIGNARD REAGENT
DIKETENE AS A 3-BUTENOIC ACID SYNTHON IN TRANSITION METAL-CATALYZED ALKYLATION OF A TRIMETHYLSILYLMETHYL GRIGNARD REAGENT
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双烯作为 3-丁烯酸合成子在过渡金属催化三甲基甲硅烷基格氏试剂烷基化中的应用
DOI:
10.1246/cl.1977.103
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发表时间:
1977
影响因子:
1.6
通讯作者:
IshiiYoshio
中科院分区:
文献类型:
--
作者:
ItohKenji;YogoToshinobu;IshiiYoshio
The reaction of (CH3)3SiCH2MgCl with diketene yields 3-trimethylsilylmethyl-3-butenoic acid (1) in the presence of a catalytic amount of NiCl2(95%), PdCl2(68%), CoCl3(60%), or CuI(20%) under moderate conditions. The acid, 1, is isomerized to the conjugated acid, 4-trimethylsilyl-3-methyl-2-butenoic acid (2) by means of an excess LiN(SiMe3)2. The rearrangement proceeds stereoselectively to 2-(E) isomer by addition of diglyme or N,N,N′,N′-tetramethylethylenediamine. This is the first example of the vinyl-oxygen bond cleavage of diketene.