Enol elimination reactions. Part III. The scope and limitations of eliminations involving enol sulphonates
作者:E. J. D. Brown、John Harley-Mason
DOI:10.1039/j39660001390
日期:——
Eliminationreactions of enolsulphonates have been further studied. The enolsulphonates of p-anisolyl-, 2-furoyl-, and 2-thenoyl-malonic esters readily gave the corresponding propiolic acids on treatment with base, whereas the enolsulphonates of o-, m-, and p-nitrobenzoylmalonic esters gave negligible yields. The enolsulphonates of cyclopropylcarbonylmalonate gave cyclopropylpropiolic acid, while
A recyclable, convenient, and efficientcatalytic system for C-acylation of 1,3-dicarbonyl compounds and malononitrile with acid chlorides has been developed, giving moderate to excellent yields under mild conditions. This is the firstcatalytic example of such reactions. In addition, by applying this protocol as the key step, 3,5-disubstituted-1H-pyrazole-4-carboxylate can easily be synthesized in