Total synthesis of epothilone D by sixfold ring cleavage of cyclopropanol intermediates
作者:Alaksiej L. Hurski、Oleg G. Kulinkovich
DOI:10.1016/j.tetlet.2010.04.109
日期:2010.7
The ring-opening or ring fragmentation reactions of cyclopropanol intermediates are used in the total synthesis of epothilone D for the creation of trisubstituted double bonds, an ethyl ketone functionality, as well as for the protection of carboxylic and ester groups. Epothilone D is obtained in 1.6% overall yield (24 steps in the longest linear sequence) starting from (R)-methyl 2,3-O-isopropylideneglycerate
环丙醇中间体的开环或开环断裂反应用于埃博霉素D的全合成中,用于产生三取代的双键,乙基酮官能团以及保护羧基和酯基。从(R)-2,3- O-异亚丙基甘油酸酯开始,以1.6%的总产率(最长的线性序列中的24步)获得埃坡霉素D。关键的环丙醇中间体可通过钛(IV)催化易得的酯与格氏试剂的反应而有效地获得。