The present invention relates to a continuous process for the enantioselective catalytic hydrogenation of β-ketoesters comprising providing a catalytic hydrogenation zone and maintaining it under conditions of temperature and pressure effective for the catalytic hydrogenation of β-ketoesters; continuously supplying to the catalytic hydrogenation zone a substrate comprising a β-ketoester to be hydrogenated, a catalyst effective for enantioselective hydrogenation of the β-ketoester and hydrogen; contacting the substrate, the catalyst and the hydrogen in the hydrogenation zone for a residence time effective for at least partial enantioselective catalytic hydrogenation of the β-ketoester; (d) continuously withdrawing from the hydrogenation zone a reaction product mixture comprising enantioselectively hydrogenated β-ketoester, unreacted β-ketoester, catalyst and hydrogen; (e) supplying the reaction product mixture to a separation zone and separating at least some of the enantioselectively hydrogenated β-ketoester from the reaction product mixture; (f) withdrawing the separated enantioselectively hydrogenated β-ketoester as product; and (g) optionally supplying at least part of the remaining material from the separation zone to the hydrogenation zone.
本发明涉及一种连续的手性选择性催化氢化β-
酮酸酯的过程,包括提供一个催化氢化区域并将其保持在适于β-
酮酸酯催化氢化的温度和压力条件下;连续向催化氢化区域提供包括待氢化的β-
酮酸酯、对β-
酮酸酯进行手性选择性氢化的催化剂和氢的底物;在氢化区域中接触底物、催化剂和氢,以获得至少部分手性选择性催化氢化β-
酮酸酯的滞留时间;(d)从催化氢化区域连续取出反应产物混合物,包括手性选择性氢化的β-
酮酸酯、未反应的β-
酮酸酯、催化剂和氢;(e)将反应产物混合物供应到分离区域,并从反应产物混合物中分离出至少一部分手性选择性氢化的β-
酮酸酯;(f)将分离出的手性选择性氢化的β-
酮酸酯作为产品取出;(g)可选择性地将分离区域中的剩余物料的至少一部分供应到催化氢化区域。