| 摘要 |
A process for the preparation of a 5-acylpyrimidine of the formula <IMAGE> in which R is an organic radical comprising reacting a methyl ketone of the formula R-CO-CH3 in a first stage with a formylating reagent in the presence of a base to form an enolketone of the formula R-CO-CH=CH-OR10 in which R10 represents hydrogen or a base radical, thereafter reacting the enolketone in 2nd and 3rd stages with formamidine or a formamidine salt, and with an amino-formylating agent, and, in a 4th stage heating to cyclize the compound formed. The end products, some of which are new, are intermediates for making herbicides.
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