synthesis are discussed. Substitution of the bromo nucleofug in the 2-position of 1,3-dicarbonylcompounds as well as of a 3-oxosulfone by selected sulfur nucleophiles is assumed to follow an SRN1 pathway. Characteristic properties, some typical reactions, and selected derivatives were studied. S-Alkyl- and S-aryl-substituted cyclic 2-thioreductones have been found to be synthons for the preparation of vinylogous
The total synthesis of agglomerin A and (±)-carolinic acid. A general method for the preparation of 3-acyl tetronic acids via direct acylation of O-methyl 3-stannyl tetronates
作者:Steven V. Ley、Mark L. Trudell、David J. Wadsworth
DOI:10.1016/s0040-4020(01)91021-x
日期:1991.9
O-methyl-3-acyl tetronates were prepared in good yield from the corresponding acid chlorides via a palladium catalyzed acylation of O-methyl 3-(tri-n-butylstannyl) tetronates 5. This new synthetic method was then exploited for the total synthesis of the novel antibiotic agglomerin A 3a, as well as the fungal metabolite (±) carolinic acid 15.