期刊
ADVANCED SYNTHESIS & CATALYSIS
卷 346, 期 9-10, 页码 1097-1100出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.200404092
关键词
benzoin; cyclization; ketones; organic catalysis; tertiary alcohols
The scope and limitations of intramolecular benzoin-forming reactions of aldlehydes and ketones catalyzed by the combination of a thiazolium salt and a base are described. After optimization of the reaction conditions, five- and six-membered cyclic acyloins were obtained in good to excellent yields and competing reactions such as intramolecular aldol reactions were suppressed. The analogous closure of seven-membered rings proved difficult.
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