期刊
TETRAHEDRON
卷 57, 期 5, 页码 845-851出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4020(00)01048-6
关键词
cationic metallosalen complex; asymmetric catalysis; hetero Diels-Alder reaction; Danishefsky's diene
Chiral cationic (R,S)- or (R,R)-(salen)-manganese(III) and -chromium(III) complexes served as the catalysts for asymmetric hetero Diels-Alder reaction of Danishefsky's diene with aldehydes, achieving high enantioselectivity (up to 97% ee at 0 degreesC). The reactions of aldehydes bearing no precoordinating functional group were well effected by using (R,R)-complexes as catalysts, while those of aldehydes bearing a precoordinating functionality were better effected by using (R,S)-complexes. (C) 2001 Elsevier Science Ltd. All rights reserved.
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