申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0757989A1
公开(公告)日:1997-02-12
The present invention involves the production of octahydrocoumarins from coumarins and/or 3,4-dihydrocoumarins in good yields by a simple process which can be industrially carried out by reducing coumarins and/or 3,4-dihydrocoumarins to octahydrocoumarins with hydrogen in the presence of an alcohol and a ruthenium catalyst, and optionally heating resultant 3-(2-hydroxycyclohexyl) propionate contained in the reduction reaction mixture to conduct cyclization/dealcoholization and convert same to octahydrocoumarins.
本发明涉及以
香豆素和/或 3,4-二氢
香豆素为原料生产八氢
香豆素,产率高,工艺简单、4-二氢
香豆素在醇和
钌催化剂存在下用
氢气还原成八氢
香豆素,并可选择加热还原反应混合物中所含的 3-
(2-羟基环己基)丙酸酯,以进行环化/脱醇反应并将其转化成八氢
香豆素。