Enantioselective Synthesis of Tertiary Allylic Fluorides by Iridium-Catalyzed Allylic Fluoroalkylation

被引:41
作者
Butcher, Trevor W. [1 ]
Hartwig, John F. [1 ]
机构
[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
基金
美国国家科学基金会;
关键词
allylic fluorides; allylic substitution; fluorine; iridium; MEDICINAL CHEMISTRY; GEM-DIFLUOROALLYLATION; FLUORINATION; PALLADIUM; ALKYLATION; REGIO; COMPLEXES; ACID; CONSTRUCTION; SUBSTITUTION;
D O I
10.1002/anie.201807474
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Few allylic electrophiles containing two different substituents at a single allyl terminus and none in which one of the two substituents is a heteroatom, have been shown previously to react with iridium catalysts to form substitution products. We report that iridium-catalysts are uniquely suited to form tertiary allylic fluorides enantioselectively by the addition of a diverse range of carbon-centered nucleophiles at the fluorine-containing terminus of 3-fluoro-substituted allylic esters. The products contain tertiary stereogenic centers bearing a single fluorine, which are isosteric with common tertiary stereocenters containing a single hydrogen. Computational studies reveal the principal steric interactions influencing the stability of endo and exo pi-allyl intermediates formed from 3,3-disubstituted allylic electrophiles.
引用
收藏
页码:13125 / 13129
页数:5
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