Michael and substitution reactions of bicyclic tetronic, tetramic and thiotetronic esters.
作者:Alberto Bertucco、John Brennan、Marco Fachini、Sabine Kluge、Patrick J. Murphy、Francesca Pasutto、Raffaella Signorini、Harri Lloyd Williams
DOI:10.1016/s0040-4020(01)85305-9
日期:1994.1
The 1,4-addition of several hetero- and carbon nucleophiles to the bicyclic structures 1, 2, 3 and 17 are reported along with the conversion of the resultant adducts to substituted tetronic, tetramic, and thiotetronic acids as well as the formation of substituted butenolides; a novel reaction mechanism has been observed for the iodotrimethylsilane (TMSI) or acetic anhydride/magnesium bromide mediated
1,4-加成的几个杂合子和碳亲核试剂的双环结构1,2,3和17都与所得的加合物的取代的特窗,特特拉姆和thiotetronic酸的转化率以及取代形成报道沿丁烯内酯; 碘三甲基硅烷(TMSI)或乙酸酐/溴化镁介导的双环四磺酸盐1的呋喃开环反应已观察到新的反应机理。