HSAB-driven regioselectivity difference in the Lewis-acid catalyzed reactions of 2-C-substituted glycals with sulfur and oxygen nucleophiles: direct versus allylic substitution
作者:Paramathevar Nagaraj、Namakkal G. Ramesh
DOI:10.1016/j.tet.2011.09.122
日期:2011.12
2-C-acteoxymethyl glycals with thiophenols and phenols has been observed. The reaction with thiophenols led to preferential formation of a new class of compounds viz. 2-C-arylthiomethyl glycals via direct attack at the C-2 side chain primary carbon bearing the leaving group. In contrast, phenols were reported to afford predominantly 2-C-methylene-O-aryl glycosides via allylic attack at the anomeric