The guanidine derivative represented by the formula [III], ##STR1## (commonly known under the name "Cimetidine") is produced by reaction of the compound represented by the formula [I], ##STR2## with a compound represented by the formula [II], ##STR3## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6, is each hydrogen atom, a lower alkyl group, phenyl group, or a radical of --OR.sub.7 or --COOR.sub.7, in which R.sub.7 is hydrogen atom, a lower alkyl group or an alkali metal, followed by reaction with methylamine.
公式[III]所代表的
鸟氨酸衍
生物(通常被称为“
西米替丁”)是通过将公式[I]所代表的化合物与公式[II]所代表的化合物反应而制得的。在公式[II]中,R1、R2、R3、R4、R5和R6分别为
氢原子、较低的烷基、
苯基或--OR7或--COOR7的基团,其中R7为
氢原子、较低的烷基或碱
金属,然后再与
甲基胺反应。