作者:R.Karl Dieter、Jeffrey R. Fishpaugh
DOI:10.1016/s0040-4039(00)83889-7
日期:1986.1
α-Oxo ketene dithioacetals can be converted into α-pyrones in a three step process involving 1,2-nucleophilic addition of ester or ketone enolate anions, acid promoted rearrangement, and subsequent enol lactonization. Utilization of ester enolates affords 6-alkylthio α-pyrones while ketone enolates give 3-alkyl substituted α-pyrones.
α-Oxo烯酮二硫缩醛可以通过三步过程转化为α-吡喃酮,该过程涉及酯或酮烯酸酯阴离子的1,2-亲核加成,酸促进的重排以及随后的烯醇内酯化。利用酯烯酸酯得到6-烷硫基α-吡喃酮,而酮烯醇酸酯得到3-烷基取代的α-吡喃酮。