Journal of the American Chemical Society p. 8106 - 8125 (1995)
Update date:2022-08-03
Topics:
Carreira, Erick M.
Du Bois
The asymmetric synthesis of the potent squalene synthase inhibitor (+)-zaragozic acid C is described. The synthesis allows for the preparation of multigram quantities of the dioxabicyclooctane core common to all members of this class of fungal metabolites. Supporting studies include (1) the use of [Cr(OAc)2·H2O]2 for the stereoselective reduction of ynones to trans enones, (2) an investigation of the diastereoselective dihydroxylation of γ-alkoxy-α,β-trans enones, and (3) nucleophilic addition of Me3SiC≡CLi to a dioxabicyclooctanone, wherein the product diastereoselectivity is observed to vary as a function of cosolvents (tertiary amines) and additives (LiBr). In addition, an acylation protocol is reported which permits the regioselective installation of the C(6) O-acyl side chain.
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