3-substituted 2-hydroxy-3-formylpropionic esters, the...

Details 3-substituted 2-hydroxy-3-formylpropionic esters, the... 3-substituted 2-hydroxy-3-formylpropionic esters, the...

C - Chemistry, Metallurgy

07

C

260/488, 260/482

C07C 67/327 (2006.01) C07C 69/675 (2006.01) C07C 69/716 (2006.01) C07C 69/738 (2006.01)

Patent

CA 2027010

-16- Abstract of the Disclosure: A 3-substituted 2-hydroxy-3-formylpropionic ester of the formula I Image where R1 is lower alkyl, and R2 is straight-chain or branched alkyl of 1 to 10 carbon atoms, is obtained by adding an alkanal of the formula II Image and an alkyl glyoxylate of the formula III Image simultaneously to a catalyst system composed of a salt or a mixture of a secondary amine and a carboxylic acid in such a way that the temperature does not exceed 90°C, preferably 80°C, or else aiding one of the reactants of the formula II or III to a mixture of the catalyst system described above and the other reactant in such a way that the temperature does not exceed 90°C. The 2-hydroxy-3- formylpropionic ester of the formula I can be converted by treatment with dehydrating agents, especially acetic anhydride, into good yields of the corresponding 3-substituted 3-formylacrylic ester.

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