Process for the preparation of intermediates useful in the...

Details Process for the preparation of intermediates useful in the... Process for the preparation of intermediates useful in the...

C - Chemistry, Metallurgy

07

C

C07C 255/54 (2006.01) C07C 51/347 (2006.01) C07C 65/28 (2006.01) C07C 201/12 (2006.01) C07C 205/37 (2006.01) C07C 253/30 (2006.01) C07D 213/84 (2006.01) C07D 311/68 (2006.01) C07D 405/02 (2006.01) C07D 413/12 (2006.01) C07D 417/12 (2006.01) C07F 9/40 (2006.01)

Patent

CA 2109399

Abstract PROCESS FOR THE PREPARATION OF INTERMEDIATES USEFUL IN THE PREPARATION OF PYRANYL CYANOGUANIDINE DERIVATIVES A process for preparing compounds of the formula Image where a, b, c, R1, R2, and R3 are as defined herein including the step of alkylating a phenol of formula II Image with an acetylene of formula III Image where X is chlorine; bromine; -OC(O)-R5, where R5 is alkyl, aryl or Image substituted aryl; or-OCO2R6, where R6 is alkyl or Image , in the presence of a catalytic amount of a cuprous or cupric salt. The compounds of formula I are intermediates useful in the preparation of pyranyl cyanoguanidine derivatives.

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