PALLADIUM(II)-CATALYZED CARBONYLATION OF 3-BUTEN-1-OLS AND 3-BUTYN-1-OLS - AN EFFICIENT SYNTHESIS OF GAMMA-BUTYROLACTONES

被引:107
作者
TAMARU, Y [1 ]
HOJO, M [1 ]
YOSHIDA, Z [1 ]
机构
[1] KYOTO UNIV,FAC ENGN,DEPT SYNTHET CHEM,SAKYO KU,KYOTO 606,JAPAN
关键词
D O I
10.1021/jo00003a036
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Palladium(II)-catalyzed dicarbonylation of 3-buten-1-ols (1) in the presence of propylene oxide and ethyl orthoacetate in methanol-dichloromethane under carbon monoxide at atmospheric pressure afforded alpha-[(methoxycarbonyl)methyl]-gamma-butyrolactones (2) in good yields. This dicarbonylation reaction occurs via stereospecific cis addition. Under similar conditions, 4-(trimethylsilyl)-3-butyn-1-ols (4a and 4b) undergo dicarbonylation to provide cis-dicarbonylated alpha-methylene-gamma-butyrolactones (5a and 5b, respectively). 4-Alkyl-and 4-aryl-3-butyn-1-ols (4c-g), on the other hand, undergo trans alkoxycarbonylation across the triple bond and selectively furnish E tetrasubstituted alpha-methylene-gamma-butyrolactones (6).
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页码:1099 / 1105
页数:7
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