gem-Difluorination of Alkenyl N-methyliminodiacetyl Boronates: Synthesis of α- and β-Difluorinated Alkylborons

被引:77
作者
Lv, Wen-Xin [1 ]
Li, Qingjiang [1 ]
Li, Ji-Lin [1 ]
Li, Zhan [1 ]
Lin, E. [1 ]
Tan, Dong-Hang [1 ]
Cai, Yuan-Hong [1 ]
Fan, Wen-Xin [1 ]
Wang, Honggen [1 ]
机构
[1] Sun Yat Sen Univ, Sch Pharmaceut Sci, Guangzhou 510006, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
alkenes; fluorination; hypervalent compounds; migration; oxidation; ARYL BORONIC ACIDS; ASYMMETRIC-SYNTHESIS; FLUORINATION; FUNCTIONALIZATION; CONSTRUCTION; ACCESS; DIFLUOROMETHYLATION; ACTIVATION; FLUORIDE; ALCOHOLS;
D O I
10.1002/anie.201810204
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Organofluorine compounds are widely used in pharmaceutical, agrochemical, and materials sciences. The syntheses and applications of fluorinated organoborons facilitate the rapid and modular assemblies of fluorine-containing molecules because of the versatility of C-B bonds in diverse chemical transformations. Reported herein is a migratory geminal difluorination of aryl-substituted alkenyl N-methyliminodiacetyl (MIDA) boronates using commercially available PyHF as the fluorine source and hyperiodine as the oxidant. The protocol offers facile access to alpha- and beta-difluorinated alkylboron compounds, both of which have previously been challenging to prepare. Mild reaction conditions, broad substrate scope, good functional-group tolerance, and moderate to good yields were observed. The utility of these products is demonstrated by further transformations of the C-B bond into other valuable functional groups.
引用
收藏
页码:16544 / 16548
页数:5
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