Use of 1,3-oxazolidin-2-one derivatives of 3-borylpropenoic acids as β-hydroxy acrylic acid equivalents in the asymmetric Diels-Alder reaction catalyzed by a chiral titanium reagent
作者:Koichi Narasaka、Ichiro Yamamoto
DOI:10.1016/0040-4020(92)80025-b
日期:1992.7
Catalytic asymmetric Diels-Alder reaction was developed by employing 3-(3-boryl-propenoyl)-1,3-oxazolidin-2-one as a β-hydroxyacrylic acid equivalent. With a catalytic amount of the titanium reagent, 3-(3-borylpropenoyl)-1,3-oxazolidin-2-ones react smoothly with various dienes in the presence of Molecular Sieves 4A to afford the adducts in high yield with high optical purity. Boryl groups of the adducts
催化不对称Diels-Alder反应是通过使用3-(3-硼基-丙烯酰基)-1,3-恶唑烷-2-酮作为β-羟基丙烯酸等效物来进行的。用催化量的钛试剂,在分子筛4A的存在下,3-(3-硼基丙烯酰基)-1,3-恶唑烷-2-酮与各种二烯平稳反应,以高收率和高光学纯度提供加合物。加合物的硼烷基被氧化转化为羟基。