Benzylcyanoacetals

Details Benzylcyanoacetals Benzylcyanoacetals

C - Chemistry, Metallurgy

07

D

260/559.4, 260/2

C07D 239/48 (2006.01) C07C 121/75 (1980.01)

Patent

CA 1091672

ABSTRACT OF THE DISCLOSURE Benzyl cyanoacetals of formula: Image wherein R1, R2 and R3 are the same or different and each is a halogen or hydrogen atom, an alkoxy group, an alkyl group, or a dialkylamino group; R4 is an alkoxycarbonyl group or an alde- hyde group; and R5 is an alkyl group; the alkyl or alkoxy groups each having from 1 to 4 carbon atoms, and their use as inter- mediates in the preparation of antibacterial 2,4-diamino-5- benzylpyrimidines. They are prepared from a reaction between an orthoester and an .alpha.-substituted-.beta.-benzylpropionitrile and then the resulting cyanoacetal is converted to the benzyl- pyrimidine by reaction with guanidine.

280134

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