PRODUCTION OF 33PENTENOIC ESTER

摘要

PURPOSE:The hydroesterification of butadiene is effected in the presence of a small amount of cobalt carbonyl catalyst using a solvent mixture composed of pyridine and isoquinoline to produce the titled compound in high selectivity and yield with high industrial efficiency. CONSTITUTION:The reaction between butadiene, carbon monoxide and a lower alcohol such as methanol is conducted in a solvent mixture composed of pyridine and isoquinoline in the presence of a cobalt carbonyl catalyst such as dicobalt octacarbonyl at 100-140 deg.C under 100-300kg/cm<2> carbon monoxide partial pressure to produce 3-pentenoic ester. The molar ratio of pyridine to isoquinoline is 1/(0.05- 10), preferably (0.1-5). The amount of the catalyst is 0.05-0.02mol/mol of butadiene. EFFECT:A raw material, butadiene, is effectively utilized in low catalyst costs and the process is greatly significant as an industrial hydroesterification one.