[DMAPTs]+Cl- : A Promising Versatile Regioselective Tosyl Transfer Reagent

摘要

Regioselective monotosylation, for the first time on 2,4-syn & 2,4-anti configured ene-tetrols and on diols & triols was achieved in excellent yields and selectivity by employing [DMAPTs]~+Cl~-, 1. We also proposed and developed operational flexible preferential regio-complimentary tosylation of cis-1,2- diol moiety of pyranosides by employing 1. Further NMR correlation for unambiguous structure determination of regioselectivity and also preferred conformations of these pyranosides were established.