乙醇 、 、 (3Z)-3-溴-4-羟基-3-丁烯-2-酮 以
甲苯 为溶剂,
反应 2.0h,
以to give 38.6 g (100%) of 3-bromo-4-ethoxy-3-buten-2-one as a mobile oil的产率得到3-Bromo-4-ethoxybut-3-EN-2-one
A series of 2-guanidino-4-heteroarylthiazoles, wherein the heteroaryl substituent is selected from thiazolyl, triazolyl, imidazolyl, and 2-alkyl, 2-amino and 2-carboxamido derivatives thereof, are disclosed. The novel compounds have activity as antisecretory agents and histamine H.sub.2 antagonists and are useful for the treatment of gastric hyperacidity and peptic ulcers. Also disclosed are pharmaceutical compositions containing the novel compounds of this invention and a method of using the compounds in the treatment of gastric hyperacidity and peptic ulcers. Novel intermediates useful in the preparation of the novel antisecretory compounds are also described.
A series of 2-guanidino-4-heteroarylthiazoles, wherein the heteroaryl substituent is selected from thiazolyl, triazolyl, imidazolyl, and 2-alkyl, 2-amino and 2-carboxamido derivatives thereof, are disclosed. The novel compounds have activity as antisecretory agents and histamine H.sub.2 antagonists and are useful for the treatment of gastric hyperacidity and peptic ulcers. Also disclosed are pharmaceutical compositions containing the novel compounds of this invention and a method of using the compounds in the treatment of gastric hyperacidity and peptic ulcers. Novel intermediates useful in the preparation of the novel antisecretory compounds are also described.
2,4-Disubstituted thiazole compounds of the formula ##STR1## or a pharmaceutically acceptable acid addition salt thereof wherein X is NH and Y is CH or N, or X is S and Y is CH; R.sup.1 is certain straight or branched chain alkyl groups, (R.sup.3).sub.2 C.sub.6 H.sub.3, or (R.sup.3).sub.2 Ar(CH.sub.2).sub.n where n is an integer from 1 to 4, R.sup.3 is H or certain substituent groups and Ar is phenylene, naphthalene or the residue of certain heteroaromatic groups; R.sup.2 is H or (C.sub.1 -C.sub.4)alkyl; or R.sup.1 and R.sup.2 taken together with the nitrogen atom to which they are attached form certain heterocyclic groups; and R.sup.4 is H, (C.sub.1 -C.sub.5)alkyl, NH.sub.2 or CH.sub.2 OH; a method for their use in treatment of gastric ulcers in mammals and pharmaceutical compositions containing said compounds.
A series of 2-guanidino-4-heteroarylthiazoles, wherein the heteroaryl substituent is selected from thiazolyl, triazolyl, imidazolyl, and 2-alkyl, 2-amino and 2-carboxamido derivatives thereof, are disclosed. The novel compounds have activity as antisecretory agents and histamine H.sub.2 antagonists and are useful for the treatment of gastric hyperacidity and peptic ulcers. Also disclosed are pharmaceutical compositions containing the novel compounds of this invention and a method of using the compounds in the treatment of gastric hyperacidity and peptic ulcers. Novel intermediates useful in the preparation of the novel antisecretory compounds are also described.