CHIRAL LEWIS ACID-CATALYZED ASYMMETRIC HETERO-DIELS-ALDER REACTION OF (E)-2-OXO-1-PHENYLSULFONYL-3-ALKENES WITH VINYL ETHERS

被引:53
作者
WADA, E [1 ]
YASUOKA, H [1 ]
KANEMASA, S [1 ]
机构
[1] KYUSHU UNIV, INTERDISCIPLINARY GRAD SCH ENGN SCI, DEPT MOLEC SCI & TECHNOL, KASUGA, FUKUOKA 816, JAPAN
关键词
D O I
10.1246/cl.1994.1637
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
(E)-2-Oxo-1-phenylsulfonyl-3-alkenes are effectively activated with the aid of a catalytic amount of chiral titanium reagents in hetero Diels-Alder reactions with vinyl ethers to produce (2R,4R) or (2R,4S)-2,4-cis-2-alkoxy-4-substituted-3,4-dihydro-2H-pyrans in highly endo- and enantioselective manners. The resulting cycloadducts are transformed to 5-substituted (SR)-2-phenylsulfonyl-2-cyclohexen-1-ones which are useful as new chiral building blocks.
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页码:1637 / 1640
页数:4
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