申请人:Banyu Pharmaceutical Co., Ltd.
公开号:US05498717A1
公开(公告)日:1996-03-12
This invention relates to novel 6,7-dialkoxy-3,4-dihydroisoquinolin-8-ols, a process for preparing the 6,7-dialkoxy-3,4-dihydroisoquinolin-8-ols reioselectively and in a high yield utilizing the Bischler-Napieralski reaction, a process for synthesizing 6,7-dialkoxy-1,2,3,4-tetrahydroisoquinolin-8-ols via the compounds, and use of the 6,7-dialkoxy-3,4-dihydroisoquinolin-8-ols for preparation of the 6,7-dialkoxy-1, 2,3,4-tetrahydroisoquinolin-8-ols. It is possible according to this invention, to obtain the 6,7 -dialkoxy-1,2,3,4-tetrahydroisoquinolin-8-ols, which have hitherto been difficult to synthesize, via the 6,7-dialkoxy-3,4-dihydroisoquinolin-8-ols in a high yield.
本发明涉及新型6,7-二烷氧基-
3,4-二氢异喹啉-8-醇,一种利用Bischler-Napieralski反应,具有高选择性和高收率的制备6,7-二烷氧基-
3,4-二氢异喹啉-8-醇的方法,通过该化合物合成6,7-二烷氧基-1,2,3,4-
四氢异喹啉-8-醇的方法,以及利用6,7-二烷氧基-
3,4-二氢异喹啉-8-醇制备6,7-二烷氧基-1,2,3,4-
四氢异喹啉-8-醇。根据本发明,可以高收率地合成迄今为止难以合成的6,7-二烷氧基-1,2,3,4-
四氢异喹啉-8-醇,通过6,7-二烷氧基-
3,4-二氢异喹啉-8-醇。