The photochemical conversion of some heterocyclic acraldehydes into derivatives of propionic acid

Abstract

Some 3-(triazolopyridyl)- and 3-(v-triazolyl)acraldehydes have been found to add methanol in high yield to give the corresponding propionates when irradiated through quartz or Pyrex. A keten intermediate is suggested, and a reaction scheme has been tested by deuteriation studies. Other hydroxylic solvents (water or t-butyl alcohol) can also be added to the acraldehydes, giving the corresponding propionic acid or t-butyl ester.