1-Benzenesulfinyl Piperidine/Trifluoromethanesulfonic Anhydride: A Potent Combination of Shelf-Stable Reagents for the Low-Temperature Conversion of Thioglycosides to Glycosyl Triflates and for the Formation of Diverse Glycosidic Linkages
作者:David Crich、Mark Smith
DOI:10.1021/ja0111481
日期:2001.9.1
piperidine (BSP) and trifluoromethanesulfonic anhydride (Tf(2)O) forms a new, powerful, metal-free thiophile that can readily activate both armed and disarmed thioglycosides, via glycosyl triflates, in a matter of minutes at -60 degrees C in dichloromethane, in the presence of 2,4,6-tri-tert-butylpyrimidine (TTBP). The glycosyl triflates are rapidly and cleanly converted to glycosides, upon treatment with
1-苯亚磺酰基哌啶 (BSP) 和三氟甲磺酸酐 (Tf(2)O) 的组合形成了一种新的、强大的、无金属的亲硫试剂,可以在几分钟内通过糖基三氟甲磺酸酯轻松激活武装和解除武装的硫糖苷。 -60 摄氏度,在二氯甲烷中,存在 2,4,6-三叔丁基嘧啶 (TTBP)。用醇处理后,糖基三氟甲磺酸酯以良好的收率和选择性快速而干净地转化为糖苷。