[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF 5,6 -DIHYDRO -4H-4(S)-ETHYLAMINO-6(S)-METHYLTHIENO[2,3-b] THIOPYRAN-2-SULFONAMIDE- 7,7 -DIOXIDE AND ITS SALT<br/>[FR] PROCEDE AMELIORE POUR LA PREPARATION DU 5,6-DIHYDRO-4H-4(S)-ETHYLAMINO-6(S)-METHYLTHIENO[2,3-b]THIOPYRANE-2-SULFONAMIDE-7,7-DIOXYDE ET DE SON SEL
申请人:FDC LTD
公开号:WO2006038222A1
公开(公告)日:2006-04-13
The present invention relates to resolution of (cis, trans) 5,6 -dihydro -4H-4-ethylamino-6-methylthieno[2,3-b] thiopyran-2-sulfonamide-7,7 -dioxide using dibenzoyl -L- tartaric acid monohydrate or di-p-toluoyl-L-tarrtaric acid monohydrate as a chiral resolving agent in presence of methanol to obtain hemitartarate salt, purifying it to obtain hemitartarate salt of 5,6-dihydro-4 H-4 (S) -ethyl amino-6(S) methylthieno [2,3-b] thiopyran-2-sulfonamide - 7,7 -dioxide with de of >99% , Chemical purity >99.5% with cis isomer content of <0.1 % and further converting into its pharmaceutically acceptable salts, preferably hydrochloride salt.
本发明涉及使用苹果酸二苯甲酰-L-酒石酸一水合物或二对甲苯酰-L-酒石酸一水合物作为手性分离剂,通过甲醇存在下分离(cis, trans) 5,6-二氢-4H-4-乙基氨基-6-甲基噻吩[2,3-b]噻吩-2-磺酰胺-7,7-二氧化物,得到酒石酸半盐,经过纯化得到5,6-二氢-4H-4(S)-乙基氨基-6(S)甲基噻吩[2,3-b]噻吩-2-磺酰胺-7,7-二氧化物的酒石酸半盐,旋光度纯度(de) >99%,化学纯度>99.5%,顺式异构体含量<0.1%,并进一步转化为其药用可接受的盐,优选的是盐酸盐。