A method of producing an aminobutene derivative of formula (I) by allowing a butenol derivative of formula (II) to react with an amide derivative of formula (III) is disclosed. The aminobutene derivative of formula (I) can be deprotected to produce an aminobutene derivative of formula (I-1) or an aminobutene derivative of formula (I-2): ##STR1## The aminobutene derivative of formula (I-A) can also be deprotected to produce the aminobutene derivative of formula (I-B). Any or all of the above aminobutene derivatives are useful as intermediates for producing anti-ulcer drugs, and anti-ulcer drugs having an inhibitory effect on gastric acid secretion based on the antagonism against histamine H.sub.2 receptor.
本发明揭示了一种通过使式(II)的
丁烯醇衍
生物与式(III)的酰胺衍
生物反应来制备式(I)的
氨基
丁烯衍
生物的方法。式(I)的
氨基
丁烯衍
生物可以去保护基,以产生式(I-1)的
氨基
丁烯衍
生物或式(I-2)的
氨基
丁烯衍
生物:##STR1## 式(I-A)的
氨基
丁烯衍
生物也可以去保护基,以产生式(I-B)的
氨基
丁烯衍
生物。上述任何或所有的
氨基
丁烯衍
生物均可用作制备抗溃疡药物和基于对
组胺H.sub.2受体拮抗作用的抑制胃酸分泌的抗溃疡药物的中间体。