Simple Designs for the Construction of Complex Trans-Fused Polyether Toxin Frameworks. A Convergent Strategy Based on Hydroxy Ketone Cyclization of C-Linked Oxacycles
作者:Eleuterio Alvarez、Ricardo Pérez、Milagros Rico、Rosa M. Rodríguez、Julio D. Martín
DOI:10.1021/jo950547+
日期:1996.1.1
A single, unified convergent strategy for the stereocontrolledsynthesis of trans-fused polyethers was developed. It was demonstrated that the epimerization and reductive intramolecular coupling of hydroxy ketones in reactions with silane-Lewis acids (SI-LA) to generate ethers in C-linked oxacycles is affected by its conformational preference in a predictable manner. The obtained results make evident