NICKEL-CATALYZED CARBONYLATION OF ALPHA-KETO ALKYNES UNDER PHASE-TRANSFER CONDITIONS

被引:29
作者
ARZOUMANIAN, H [1 ]
JEAN, M [1 ]
NUEL, D [1 ]
CABRERA, A [1 ]
GUTIERREZ, JLG [1 ]
ROSAS, N [1 ]
机构
[1] NATL AUTONOMOUS UNIV MEXICO,INST QUIM,MEXICO CITY 04510,DF,MEXICO
关键词
D O I
10.1021/om00011a071
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
alpha-Keto alkynes are carbonylated in the presence of Ni(CN)(2) under phase transfer conditions (toluene, 5 N NaOH, tetrabutylammonium bromide) to give either unsaturated hydroxybutyrolactones or 2-alkynylidene 3-keto carboxylic acids depending on. the presence or absence of an alpha-H on the carbon alpha to the alkynyl group. This is rationalized, in the second case, by a rearrangement following abstraction of this alpha-H by base. A rearrangement to an allenic intermediate prior to carbonylation is excluded.
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页码:5438 / 5441
页数:4
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