Process for preparing benzoic acid derivative intermediates and benzothiophene pharmaceuticals
申请人:ELI LILLY AND COMPANY
公开号:EP0875507A1
公开(公告)日:1998-11-04
The invention relates to novel intermediates of formula VI
wherein
R1 and R2 each are independently C1-C4 alkyl, or R1 and R2 together with the nitrogen to which they are attached form a piperidinyl, pyrrolidinyl, methylpyrrolidinyl, dimethylpyrrolidinyl, morpholino, dimethylamino, diethylamino, or 1-hexamethyleneimino ring;
n is 2 or 3; and
Y1 is p-toluenesulfonyl-O-, methylsulfonyl-O-, trifluoromethylsulfonyl-O-, 2,2,2-trifluoroethylsulfonyl-O-, or trifluoroacetyl-O-;
or a salt or solvate thereof.
and processes for producing benzothiophenes of formula II
wherein R4 and R5 are each independently a hydroxy protecting group.
该发明涉及公式VI的新型中间体,其中R1和R2各自独立地是C1-C4烷基,或者R1和R2与它们连接的氮一起形成哌啶基、吡咯基、甲基吡咯基、二甲基吡咯基、吗啉基、二甲基氨基、二乙基氨基或1-己亚甲基氨基环;n为2或3;Y1为对甲苯磺酰氧基、甲磺酰氧基、三氟甲基磺酰氧基、2,2,2-三氟乙基磺酰氧基或三氟乙酰氧基;或其盐或溶剂合物。以及生产公式II的苯并噻吩的方法,其中R4和R5各自独立地是羟基保护基。