A process for the production of acetylpyridines of the formula (1):
by reacting a pyridinecarboxylic ester of the formula (II):
wherein R
1
is C
1-6
-alkyl, with acetic acid in the gas phase in the presence of a catalyst. The active material of the catalyst is titanium dioxide and at least one alkali or alkaline earth metal oxide, and it is supported on an alumina-silica support having an apparent porosity of at least 50 percent. The process has the advantage of producing only small amounts of by-products (e.g., pyidine).
一种生产式(1)的乙酰
吡啶的方法,包括以下步骤:将式(II)的
吡啶羧酸酯与
乙酸在气相中在催化剂的存在下反应,其中R1为C1-6烷基。催化剂的活性物质为
二氧化钛和至少一种碱
金属或碱土金属氧化物,并且它被支撑在具有至少50%表观孔隙度的氧化铝-
硅质载体上。该方法的优点是仅产生少量副产物(例如
吡啶)。