4,6-二氯喹唑啉 、 对氨基苯磺酸 在
乙醇 、 hemihydrate 作用下,
以
乙醇 为溶剂,
反应 2.0h,
以to give the title compound (9.2 g) as the hemihydrate m.p. greater than 300° C.的产率得到4-(6-Chloro-4-quinazolinylamino)benzenesulphonic acid
参考文献:
名称:
4-(cinnolinylamino or quinazolinylamino)benzenesulphonamides and
4-(cinnolinylamino or quinazolinylamino)benzenesulphonamides and
申请人:John Wyeth & Brother Limited
公开号:US04640920A1
公开(公告)日:1987-02-03
Novel quinazoline and cinnoline derivatives having the formula ##STR1## (wherein one of A and B is CH and the other one of A and B is N; X.sub.1 is halogen or CF.sub.3 and X.sub.3 is one of the groups II, III, IV or V ##STR2## where Q is lower alkylene; R.sub.1 is hydrogen or lower alkyl; R.sub.2 and R.sub.3 are independently lower alkyl or R.sub.2 and R.sub.3 are a divalent radical such that HNR.sub.2 R.sub.3 is a secondary cyclic amine with 5 to 7 ring atoms; R.sub.4 is lower alkyl; n is 0 or 1; the rings shown in formulae III and IV are piperidine or pyrrolidine optionally substituted by lower alkyl; and the ring shown in formula V is piperazine optionally substituted by lower alkyl) and their pharmaceutically acceptable salts are useful as pharmaceuticals particularly as anti-hypertensives. Novel intermediates are also described including the corresponding sulphonic acids of formula I (where A, B and X.sub.1 are defined above and X.sub.3 is OH).
4-substituted-N-(piperidinyl or pyrrolidinyl)alkyl benzenesulfonamides
申请人:John Wyeth & Brother Limited
公开号:US04734510A1
公开(公告)日:1988-03-29
Novel quinazoline and cinnoline derivatives having the formula ##STR1## (wherein one of A and B is CH and the other one of A and B is N; X.sub.1 is halogen or CF.sub.3 and X.sub.3 is one of the groups II, III, IV or V ##STR2## where Q is lower alkylene; R.sub.1 is hydrogen or lower alkyl; R.sub.2 and R.sub.3 are independently lower alkyl or R.sub.2 and R.sub.3 are a divalent radical such that HNR.sub.2 R.sub.3 is a secondary cyclic amine with 5 to 7 ring atoms; R.sub.4 is lower alkyl; n is 0 or 1; the rings shown in formulae III and IV are piperidine or pyrrolidine optionally substituted by lower alkyl; and the ring shown in formula V is piperazine optionally substituted by lower alkyl) and their pharmaceutically acceptable salts are useful as pharmaceuticals particularly as anti-hypertensives. Novel intermediates are also described including the corresponding sulphonic acids of formula I (where A, B and X.sub.1 are defined above and X.sub.3 is OH).