Studies towards the synthesis of (1R,2S)- and (1S,2S)-1,2-epoxy-3-hydroxypropylphosphonates and (1S,2S)- and (1R,2S)-2,3-epoxy-1-hydroxypropylphosphonates
作者:Andrzej E. Wróblewski、Irena I. Bąk-Sypień
DOI:10.1016/j.tetasy.2007.09.003
日期:2007.9
cyclisations of diethyl (1S,2R)- and (1R,2S)-1-benzyloxy-3-hydroxy-2-mesyloxypropylphosphonates led to diethyl (1S,2S)- and (1R,2S)-2,3-epoxy-1-benzyloxypropylphosphonates, respectively, with the concomitant formation of diethyl (E)-1-benzyloxy-3-hydroxyprop-1-en-1-phosphonate. From diethyl (1S,2S)- and (1R,2S)-2,3-epoxy-1-benzyloxypropylphosphonates, enantiomerically pure diethyl (1S,2S)- and (1R,2S)-1,2-
的反式-型磷霉素类似物,二(1小号,2小号)-1,2-环氧-3- hydroxypropylphosphonate,用二乙的分子内Williamson反应(1合成的小号,2 - [R)-1,3-二羟基-2- -甲磺酰氧基丙基膦酸酯。当(1 R,2 R)-1,3-二羟基-2时,顺式类似物以O-乙基或O,O-二乙基(1 R,2 S)-1,2-环氧-3-羟丙基膦酸酯的形式获得。-甲磺酰氧丙基膦酸酯或其3- O-三苯甲基衍生物分别用作起始原料。(1 S,2 R)-和(1 R,2 S)-1-苄氧基-3-羟基-2-甲氧基丙基甲磺酸二乙酯的分子内Williamson环化反应生成二乙基(1 S,2 S)-和(1 R, 2 S)-2,3-环氧-1-苄氧基丙基膦酸酯,同时形成(E)-1-苄氧基-3-羟基丙-1-烯-1-膦酸二乙酯。由(1 S,2 S)-和(1 R,2 S)-2,3-环氧-1-苄氧基丙基膦酸二乙酯形成对映体纯的二乙基(1