申请人:Mediolanum farmaceutici, S.r.l.
公开号:US04923859A1
公开(公告)日:1990-05-08
Pyrido-benzothiazine derivatives having the following general formula: ##STR1## in which R is H or a C.sub.1 -C.sub.6 alkyl or a C.sub.1 -C.sub.6 fluoroalkyl, and R.sub.1 is N-alkyl-3-pyrrolidinalkylamine with C.sub.1 to C.sub.6 alkyls or ##STR2## where R.sub.2 is a S.sub.1 -C.sub.6 alkyl or a C.sub.2 -C.sub.6 alkenyl or an arylalkyl group, possibly substituted by halogen, hydroxy or keto-groups, both in the racemic form and in the optically active form. The invention also comprises the process for the preparation of derivatives of formula (I) starting from 2.4-difluoro-3-chloronitrobenzene. Said derivatives possess a high antibacterial acitvity as well as a high bioavailability to tissues; the invention also refers to pharmaceutical compositions containing them as active components.
具有以下通式的吡啶并噻唑衍生物:##STR1##
其中R为H或C.sub.1-C.sub.6烷基或C.sub.1-C.sub.6氟烷基,R.sub.1为N-烷基-3-吡咯烷基胺,其烷基为C.sub.1到C.sub.6烷基,或##STR2##
其中R.sub.2为S.sub.1-C.sub.6烷基或C.sub.2-C.sub.6烯基或芳基烷基,可能被卤素,羟基或酮基取代,既包括外消旋体又包括光学活性体。本发明还包括从2,4-二氟-3-氯硝基苯开始制备式(I)衍生物的过程。所述衍生物具有高抗菌活性以及对组织的高生物利用度;本发明还涉及包含它们作为活性成分的制药组合物。