Synthèse de monodioxolannes de dicétones-1,4 et de dicétones-1,4 au moyen des anhydrides mixtes carboxyliques et carboniques: application à la
作者:J.-L. Moreau、R. Couffignal、R. Arois-Chtara
DOI:10.1016/s0040-4020(01)92014-9
日期:1981.1
Levulinic acid 1 is easily converted by two steps into mixed carboxylic and carbonic anhydride 3 which reacts with the organolithium reagent issued from trimethylsilyl esters Monoethylene acetal of 1,4-diketones 4 can be prepared; it is also possible to obtain 1,4-diketones 5 in one step by hot acid hydrolysis. The preparation of the dihydrojasmone 6d, Z-jasmone 6eand dehydrojasmone 6f shows the efficiency
戊二酸1易于通过两步转化为混合的羧酸和碳酸酐3,与由三甲基甲硅烷基酯制得的有机锂试剂反应,可以制得1,4-二酮4的单亚乙基乙缩醛。也可以通过热酸水解一步获得1,4-二酮5。的二氢茉莉酮的制备6D,Z -茉莉酮6E和dehydrojasmone 6F示出了该过程的效率。