A process for the preparation of tetrahydro-alpha-pyrones comprises preparing the alkyl ester of a 5-oxo alkanoic acid from a 4-oxo alkane carbonitrile, obtained in a first stage by the action of benzyl cyanide on the corresponding alkenone, and then saponifying the obtained ester, followed by hydrogenation and cyclization.
一种制备四氢-
α-吡喃酮的过程,包括从一种4-氧代烷基碳腈中制备5-氧代烷酸的烷基酯,该碳腈在第一阶段通过苄基
氰对应的烯酮作用得到,然后皂化所得的酯,接着进行氢化和环化。