Preparation of methylfuro[3,4-b][1,4]benzodioxinones as intermediates for the synthesis of substituted polycyclic systems. Importance of the acid used as catalyst
作者:Consol Bozzo、M.Dolors Pujol
DOI:10.1016/s0040-4020(99)00670-5
日期:1999.10
conveniently prepared in excellent yield by reaction of the corresponding γ-hydroxy amides 6, 7 and 8 in the presence of propionic acid in catalytic amounts. By increasing the ratio of propionic acid used, under the same reaction conditions, the hydroxy amide 6 reacted to give a mixture of ketoamides 13 (cis / trans).
通过使相应的γ-羟基酰胺6、7和8在催化量的丙酸存在下反应,可以方便地以优异的产率制备内酯10和11。在相同的反应条件下,通过增加丙酸的比例,使羟基酰胺6反应生成酮酰胺13(顺式/反式)的混合物。