the (4S)-4-hydroxy-5-(4′-methoxyphenyl)-2(E)-pentenoate 5 using the AgNO3/MS 4 Å/MeNO2 system was accomplished along with complete inversion at the C4-position, and the synthesis of the intermediate (4S)-7 for the chiral synthesis of (−)-anisomycin 6 from (4S)-7 based on osmium tetroxide-catalyzed stereoselective hydroxylation was achieved.
(4所述的立体选择性转化- [R)-5-羟基-4-(4'-
甲氧基苯基)-2(É)-pentenoate 4到(4小号)-
4-羟基-5-(4'-
甲氧基苯基)-2-使用AgNO 3 / MS 4Å/ MeNO 2系统完成(E)-
戊烯酸酯5以及在C 4位完全转化,并合成中间体(4 S)-7用于手性合成(-基于四氧化os催化的立体选择性羟基化反应,获得了(4 S)-7的)-
茴香霉素6。