Synthesis of glycosyl fluorides from (phenylthio)glycosides using IF5–pyridine–HF
摘要:
IF5-pyridine-HF, an air- and moisture-stable fluorinating reagent, was applied to the synthesis of glycosyl fluorides from (phenylthio) glycosides. Common protecting groups of alcohol and diol can tolerate the reaction conditions performed, and therefore, the present method is applicable to the synthesis of various glycosyl fluorides. (C) 2015 Elsevier Ltd. All rights reserved.
Thiophenyl glycosides are converted to C-glycosides by reaction with allyl or methallyltri-n-butylstannane using both “one-electron” and “two-electron” procedures, which give different stereoselectivities in some cases.
1-Lithiated glycals generated by reaction of 1-phenylsulfinyl glycals with either t-BuLi or PhLi are transformed to 1-tributylstannyl glycals on reaction with tributyltin chloride.