Enantioselective cyclization of chiral butane-1,4-diols to chiral tetrahydrofurans: synthesis of chiral trans-2-(3-methoxy-5-methylsulfonyl-4-propoxyphenyl)-5-(3,4,5-trimethoxyphenyl)tetrahydrofuran (L-659,989), a potent PAF-receptor antagonist
作者:M.M. Ponpipom、R.L. Bugianesi、J.C. Chabala
DOI:10.1016/s0040-4039(00)82307-2
日期:1988.1
Acid catalyzed cyclization of (1R,4RS)- and (1S,4RS)-1-(3-methoxy-5-methylsulfonyl-4-propoxyphenyl)-4-(3,4,5-trimethoxyphenyl)butane-1,4-diols to the corresponding chiral cis- and trans-tetrahydrofurans proceeds with retention of configuration at C-1. Using this stereo- and regioselective reaction, the two optically active enantiomers of L-659,989, a potent PAF-receptor antagonist, were prepared.
(1 R,4 RS)-和(1 S,4 RS)-1-(3-甲氧基-5-甲基磺酰基-4-丙氧基苯基)-4-(3,4,5-三甲氧基苯基)丁烷-的酸催化环化相应的手性顺式-和反式-四氢呋喃的1,4-二醇以保留在C-1处的构型进行。使用该立体和区域选择性反应,制备了L-659,989(一种有效的PAF受体拮抗剂)的两种旋光对映体。