期刊
HELVETICA CHIMICA ACTA
卷 85, 期 12, 页码 4468-4484出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/hlca.200290023
关键词
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A facile and highly efficient method for the preparation of alpha-nitro-alpha-diazocarbonyl derivatives by a diazo-transfer reaction involving (trifluoromethyl)sulfonyl azide has been developed. These substrates undergo a rhodium-catalyzed cyclopropanation reaction with a variety of alkenes. A systematic study of the reaction indicated that the diastereoselectivity of the cyclopropanation could be effectively controlled through the modification of the steric hulk of the diazo reagent. A novel O - H insertion reaction of the metal - carbene complex derived from the alpha-nitro-alpha-diazocarbonyl reagent afforded the corresponding, novel alpha-nitro-alpha-alkoxy carbonyl derivatives.
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