STEREOCONTROLLED AND REGIOCONTROLLED CARBON-CARBON BOND FORMATION MEDIATED BY TUNGSTEN IN THE SYN-TRANS-ETA-4-DIENE CATIONIC INTERMEDIATES

被引：9

作者：

CHENG, MH

HO, YH

WANG, SL

CHENG, CY

PENG, SM

LEE, GH

LIU, RS

机构：

[1] NATL TSINGHUA UNIV,DEPT CHEM,HSINCHU 30043,TAIWAN

[2] NATL TAIWAN UNIV,DEPT CHEM,TAIPEI 10764,TAIWAN

来源：

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS | 1992年 / 01期

关键词：

D O I：

10.1039/c39920000045

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The tungsten-eta(3)-2-substituted pentadienyl complexes WC5H5(CO)2(syn-eta(3)-2-R-C5H6) (R = COOMe; CMe = CH2) undergo BF3-catalysed stereoselective carbon-carbon bond formation with aldehydes to afford isolable s-trans-diene cations which after hydrolysis produces tungsten-eta(3)-allyl-1,3-diols; utilization of the diols for stereoselective synthesis of alpha-methylene-gamma-butyrolactones, furanone skeletons, have been reported in good yields (> 80%).

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页码：45 / 46

页数：2

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