3, 3, 3 apos; preparation method of-carbonyl bis (7-diethylamino coumarin) compound

The invention discloses a preparation method of a 3, 3 '-carbonyl bis (7-diethylamino coumarin) compound, which comprises the following steps: (1) in an inert gas environment, reacting a compound 1 with a compound 2 Meldrum's acid and a compound 3 methanesulfonic anhydride in a first reaction solvent under the action of a metal catalyst at the reaction temperature of 0-150 DEG C to obtain a compound 4 after the reaction is complete; and (2) reacting the compound 4 with a compound 5 in a second reaction solvent under the action of a catalyst at the reaction temperature of-20 to 200 DEG C to obtain a compound 6 3, 3 '-carbonyl bis (7-diethylamino coumarin) after the reaction is completed. The key raw materials are cheap and easy to obtain; the method is mild in reaction conditions, friendly to operators, high in reaction yield and high in product purity, greatly reduces the production cost, and can fully meet the production requirements of products above tonnage. 3,3'-羰基双(7-二乙氨基香豆素)化合物的制备方法，包括：（1）在惰性气体环境下，化合物1与