Synthetic studies toward phorboxazole A. Stereoselective synthesis of the C3C19 and C20C32 subunits
作者:David R Williams、Michael P Clark、Martin A Berliner
DOI:10.1016/s0040-4039(99)00209-9
日期:1999.3
stereocontrolled synthesis of two fragments comprising the macrocyclic core of Phorboxazole A is described. The C3C19 bis-pyran segment is prepared utilizing reiterative enantioselective allylations from homochiral allylstannanes followed by stereoselective cyclizations. The pentasubstituted tetrahydropyran of the C20C32 fragment is prepared via an intramolecular stereoselective cationic cyclization