Synthesis of substituted chromanones: an organocatalytic aldol/oxa-Michael reaction.
Synthesis of substituted chromanones: an organocatalytic aldol/oxa-Michael reaction.
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DOI:
10.1021/ol101221c
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发表时间:
2010-08-06
期刊:
影响因子:
5.2
通讯作者:
Kurth, Mark J.
中科院分区:
文献类型:
--
作者:
Butler, Jeffrey D.;Conrad, Wayne E.;Lodewyk, Michael W.;Fettinger, James C.;Tantillo, Dean J.;Kurth, Mark J.
A diastereoselective organocatalytic aldol/oxa-Michael reaction has been developed to efficiently deliver medicinally relevant 2,3-ring substituted chromanones. Development of this synthetic strategy revealed an unexpected kinetic anti-Saytzeff elimination; an origin for the observed selectivity is suggested based on the results of quantum chemical calculations. This unusual kinetic selectivity necessitated an isomerization protocol that in turn led to the discovery of an intriguing Pd-mediated isomerization/intramolecular Friedel-Crafts-type alkylation.
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