期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 69, 期 8, 页码 2874-2876出版社
AMER CHEMICAL SOC
DOI: 10.1021/jo035719e
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Chiral quaternary ammonium salts derived from cinchonidine have been applied to catalyze the stereoselective iodolactonizations of trans-5-aryl-4-pentenoic acids leading to a mixture of two regioselectively iodolactonized products with fair to excellent yield (37-98%) and moderate enantioselectivity (exo = 42.0% ee, endo = 31.0% ee) under mild conditions. This work is the first example of asymmetric iodolactonization reaction in the presence of less than a stoichiometric amount of chiral reagent.
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