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.
本发明公开了一种通过让式(II)的
丁醇衍
生物与式(III)的酰胺衍
生物发生反应来制备式(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:
氨基
丁烯衍
生物的式(I-A)也可以去保护以产生式(I-B)的
氨基
丁烯衍
生物。上述任何或所有
氨基
丁烯衍
生物均可用作制备抗溃疡药物的中间体,以及基于对
组胺H.sub.2受体拮抗作用的抗溃疡药物,其具有对胃酸分泌具有抑制作用的效果。