The instant invention provides a new and improved method of preparing .alpha.-hydroxycarbonyl compounds, particularly substituted cyclopent-2-en-2-ol-1-ones and substituted 3-hydroxy-2(5H)-furanones. The novel sequence involves a number of novel intermediates including substituted 2-cyanocyclopentanones, substituted 2-cyano-2-hydroxycyclopentanones, and 2-cyano-2-hydroxyvalero-.gamma.-lactones.
本发明提供了一种新的和改进的制备α-羟基羰基化合物的方法,特别是取代的环戊-2-烯-2-醇-1-酮和取代的3-羟基-2(5H)-
呋喃酮。这种新颖的序列涉及到许多新颖的中间体,包括取代的
2-氰基环戊酮,取代的2-
氰基-
2-羟基环戊酮和2-
氰基-2-羟基
戊二酸-γ-内酯。