Syntheses of Ring-Fluorinated Isoquinolines and Quinolines via Intramolecular Substitution: Cyclization of 1,1-Difluoro-1-alkenes Bearing a Sulfonamide Moiety
作者:Junji Ichikawa、Kotaro Sakoda、Hiroko Moriyama、Yukinori Wada
DOI:10.1055/s-2006-926458
日期:2006.5
On treatment of a base such as NaH, KH, or Et3N, N-[o-(2,2-difluorovinyl)benzyl]- and N-[o-(3,3-difluoroallyl)phenyl]-substituted p-toluenesulfonamides readily undergo intramolecular substitution of sulfonamide nitrogens for vinylic fluorines in a 6-endo-trig fashion, leading to 3-fluoroisoquinoline and 2-fluoroquinoline derivatives, respectively, in high yields.
经 NaH、KH 或 Et3N 等碱处理后,N-[邻-(2,2-二氟乙烯基)苄基]- 和 N-[邻-(3,3-二氟烯丙基)苯基]- 取代的对甲苯磺酰胺很容易以 6-endo-trig 方式发生磺酰胺硝基对乙烯基氟的分子内取代,从而分别高产出 3-氟异喹啉和 2-氟喹啉衍生物。