作者:Oscar Lozano、George Blessley、Teresa Martinez del Campo、Amber L. Thompson、Guy T. Giuffredi、Michela Bettati、Matthew Walker、Richard Borman、Véronique Gouverneur
DOI:10.1002/anie.201103151
日期:2011.8.22
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
可以通过手性吲哚的氟环化来制备对映体富集的氟化杂环(参见方案; Ts =甲苯磺酰基,Bn =苄基,Boc =叔丁氧羰基)。由金鸡纳生物碱催化并采用N-氟苯磺酰亚胺作为亲电子氟源的这种级联氟化-环化的例子已有20多个,并且已经发现了前所未有的催化不对称二氟环化反应。