Conformational analysis of 5-substituted 1,3-dioxanes. 6. Study of the attractive gauche effect in O-C-C-O segments

Article abstract of DOI:10.1016/S0040-4020(01)89843-4

The positions of equilibrium, established by acid catalysis, between diastereomeric cis- and trans-5-methoxy- (2), 5-methanesulfonyloxy- (3), 5-p-(methylphenyl)sulfonyloxy- (4), and 5-(p-nitrophenyl)sulfonyloxy-2-phenyl-1,3-dioxanes (5) are reported. Quan