SYNTHESIS OF BETA-DIMORPHECOLIC ACID EXPLOITING HIGHLY STEREOSELECTIVE REDUCTION OF A SIDE-CHAIN CARBONYL GROUP IN A PI-ALLYLTRICARBONYLIRON LACTONE COMPLEX
Sv. Ley et G. Meek, SYNTHESIS OF BETA-DIMORPHECOLIC ACID EXPLOITING HIGHLY STEREOSELECTIVE REDUCTION OF A SIDE-CHAIN CARBONYL GROUP IN A PI-ALLYLTRICARBONYLIRON LACTONE COMPLEX, Journal of the Chemical Society. Perkin transactions. I, (8), 1997, pp. 1125-1133
A highly enantioselective synthesis of beta-dimorphecolic acid 1 is re
ported. The synthesis features a diastereoselective reduction of the k
etone 4, in which the tricarbonyliron lactone tether induces a 1,5 tra
nsfer of chirality, followed by a stereoselective decarboxylation to c
reate all the stereochemical elements of 1. Selective oxidation of the
primary alcohol in the diol 17 serves to introduce the acid functiona
lity.