CYANOGUANIDINE DERIVATIVES AND PROCESS FOR THE PREPARATION THEREOF

The present invention provides a compound represented by the general formula: wherein A represents phenyl, furyl, thienyl or cycloalkyl group; or such a group substituted by lower alkyl, lower alkoxy, lower alkenyl, lower alkylthio, lower alkyl sufonyl, halogen or trifluoromethyl; B represents pyridyl, phenyl or pyridine-N-oxide group; X represents an alkylene group of 1 to 6 carbon atoms or an alkylene group of 1 to 6 carbon atoms containing a terminal sulfur atom linked to the nitrogen atom of the guanidine group; Y represents a lower alkoxy or a lower alkylthio group; and p is 0 or 1, with the proviso that i) when A is unsubstituted phenyl and B is pyridyl, p is 1; and ii) when A is unsubstituted phenyl and B is phenyl or pyridine-N-oxide, p is 0, or an acid addition salt thereof. These compounds are useful as intermediates in the preparation of cyanoguanidines useful in medicines having pharmacological actions such as anti-secretory effects and local anesthesia action.