Studies on the aminopyrimidinyl group of thiamine
Abstract
Although 3-(4-amono-2-methyl-pyromidin-5-yl)mehtyl-5-ethoxycarbonyl-4-methylthiazolium chlorine (2) undergoes a rapid C-2 H/D exchange in acidic D2O, formation of its neutral tricyclic form in basic solution completely inhibits the ability of this thiamine analogue to catalyse the benzoin condensation.