2-alkoxymethylene-3,3-dialkoxy-propanenitrile compounds and...

Details 2-alkoxymethylene-3,3-dialkoxy-propanenitrile compounds and... 2-alkoxymethylene-3,3-dialkoxy-propanenitrile compounds and...

C - Chemistry, Metallurgy

07

C

260/352.3, 260/5

C07C 255/15 (2006.01) C07D 239/42 (2006.01) C07D 317/30 (2006.01)

Patent

CA 1273347

ABSTRACT OF THE DISCLOSURE There is disclosed a process for preparing a compound by the formula (II) Image wherein R1, R2 and R5 may be the same or different and each rep- resent a lower alkyl group, or R1 and R2, bonding to each other to form a ring, are a lower alkylene group, which comprises reacting a compound represented by the formula (V) Image wherein R1 and R2 have the same meanings as defined above and M represents an alkali metal, with an alcohol which boils azeotrop- ically with water, in the presence of an acid, while removing said alcohol and produced water from the reaction system by azeotropic distillation which is a intermediate in the prepara- tion of the 4-amino-5-dialkoxymethylpyrimidine derivative which is utilized as an intermediate for the synthesis of Vitamin-B1 and its analogues.

570320

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