A Straightforward Synthesis of (3<i>S</i>)-4-Methoxybutane-1,3-diol and its Use as Chiral Auxiliary for the Preparation of (p<i>S</i>)-1-(Diphenylphosphino)-2-formyl-1′,2′,3′,4′,5′-pentamethylferrocene
作者:Günter Helmchen、Felix Geisler
DOI:10.1055/s-2006-942415
日期:2006.7
(3S)-4-Methoxybutane-1,3-diol [(S)-4], an important auxiliary for the synthesis of planar-chiral metallocenes, has been obtained from (S)-1,2,4-butanetriol via formation of an isomerically pure acetal of p-nitrobenzaldehyde, O-methylation and hydrolysis. Diol (S)-4 was used in a synthesis of the new planar-chiral ferrocene (pS)-1-(diphenylphosphino)-2-formyl-1′,2′,3′,4′,5′-pentamethylferrocene [(pS)-9].
(3S)-4-甲氧基丁烷-1,3-二醇[(S)-4],作为平面手性金属烯的重要辅助剂,通过从(S)-1,2,4-丁三醇出发,形成对位硝基苯甲醛的构象纯烯醇、O-甲基化和水解获得。二醇(S)-4被用于合成新的平面手性铁烯(pS)-1-(二苯基膦)-2-甲酰基-1′,2′,3′,4′,5′-五甲基铁烯[(pS)-9]。