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
描述了立体控制的两个片段的合成,所述两个片段包含邻苯二酚A的大环核心。的C 3 C 19双-吡喃段制备利用从纯手性allylstannanes随后通过立体选择性环化对映体选择性反复烯丙基化。C 20=C 32片段的五取代四氢吡喃是通过甲氧基甲基醚衍生物的分子内立体选择性阳离子环化制备的。