Ready Transformation of Partially Unprotected Thioglycosides into Glycosyl Fluorides Mediated by NIS/HF-Pyridine or Et<sub>3</sub>N·3HF
作者:J. Cristóbal López、Paloma Bernal-Albert、Clara Uriel、Ana M. Gómez
DOI:10.1002/ejoc.200800754
日期:2008.10
The transformation of partially unprotected phenyl 1-thioglycosides into glycosyl fluorides can be conveniently carried out by treatment with NIS in the presence of HF–pyridine. Other sources of halonium ions such as NBS, IDCP, have also been employed. The combination NIS/Et3N·3HF, where triethylamine–tris(hydrogen fluoride) (Et3N·3HF) replaces HF–pyridine, can also effect this transformation when
在 HF-吡啶存在下用 NIS 处理可以方便地将部分未保护的苯基 1-硫代糖苷转化为糖基氟。还使用了其他卤离子源,例如 NBS、IDCP。当存在对酸敏感的取代基时,NIS/Et3N·3HF 组合(其中三乙胺-三(氟化氢)(Et3N·3HF)代替 HF-吡啶)也可以影响这种转化。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)