Organocatalyzed Enantioselective Fluorocyclizations

被引:319
作者
Lozano, Oscar [1 ]
Blessley, George [1 ]
del Campo, Teresa Martinez [1 ]
Thompson, Amber L. [1 ]
Giuffredi, Guy T. [1 ]
Bettati, Michela [2 ]
Walker, Matthew [2 ]
Borman, Richard [2 ]
Gouverneur, Veronique [1 ]
机构
[1] Univ Oxford, Chem Res Lab, 12 Mansfield Rd, Oxford OX1 3TA, England
[2] GlaxoSmithKline R&D, Stevenage SG1 2NY, Herts, England
关键词
alkaloids; asymmetric catalysis; fluorocyclizations; indoles; organocatalysis; ASYMMETRIC IODOCYCLIZATION; FLUORINATION; IODOCARBOCYCLIZATION; HALOCYCLIZATION; BROMOLACTONIZATION; IODOLACTONIZATION; COMPLEXES;
D O I
10.1002/anie.201103151
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Enantioenriched fluorinated heterocycles can be prepared through fluorocyclizations of prochiral indoles (see scheme; Ts=tosyl, Bn=benzyl, Boc=tert-butoxycarbonyl). More than twenty examples for this cascade fluorination-cyclization, which is catalyzed by cinchona alkaloids and employs N-fluorobenzenesulfonimide as the electrophilic fluorine source have been explored, and an unprecedented catalytic asymmetric difluorocyclization has also been identified. © 2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码:8105 / 8109
页数:5
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