Efficient solution phase parallel synthesis of norstatine analogs
作者:Michael V. Voronkov、Alexander V. Gontcharov、Zhi-Min Wang、Paul F. Richardson、Hartmuth C. Kolb
DOI:10.1016/j.tet.2004.07.085
日期:2004.10
glycidic amides with various functionalized nitriles to afford norstatine analogs in a regio- and diastereoselective fashion (43–99% yield) is described. Utilizing this chemistry, a 20 membered solutionphase library was prepared in two steps featuring three points of diversity.
(+)-Indolmycenic ester 4, a key intermediate for the synthesis of (-)-indolmycin (1), was prepared from (2S, 3R)-epoxybutyrate 5 via (2S, 3S)-2-hydroxy-3-chlorobutyrate 6 or (2R, 3R)-2-mesyloxy-3-hydroxybutyrate 12, which were obtained by lipase-catalyzed kinefic resolution of the corresponding 2-acetates.