M. Kunishima et al., Esterification of carboxylic acids with alcohols by 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methyl-morpholinium chloride (DMTMM), SYNLETT, (8), 1999, pp. 1255-1256
Reaction of carboxylic acids with DMTMM in methanol, ethanol, or isopropyl
alcohol in the presence of N-methylmorpholine affords the corresponding est
ers. The esterification can take place with an equimolar alcohol in THF.