申请人:Kao Corporation
公开号:US04670585A1
公开(公告)日:1987-06-02
2-Carboxydibenzoylmethanes of the following formula ##STR1## in which R.sub.1 and R.sub.2 are independently a substituent joined to any position of the benzene nucleus and represent a hydrogen atom, a halogen atom, a linear or branched alkyl or alkenyl group having from 1 to 18 carbon atoms, or a linear or branched, saturated or unsaturated alkoxy group having from 1 to 18 carbon atoms, m is an integer of from 1 to 4, and n is an integer of from 1 to 5 are prepared inexpensively with ease in high yield by a novel process characterized by reaction between phthalic anhydrides and acetophenones in the presence of bases. The 2-carboxydibenzoylmethanes are useful as an inhibitor of the root geotropic response of plants or a growth regulator for plants, or a stabilizer for halogen-containing resins.
以下化学式的2-羧基二苯甲酮 ##STR1## 中,其中R.sub.1和R.sub.2独立地表示连接到苯环的任意位置的取代基,可代表氢原子、卤素原子、具有1到18个碳原子的直链或支链烷基或烯基基团,或具有1到18个碳原子的直链或支链、饱和或不饱和的烷氧基团,m为1到4的整数,n为1到5的整数。通过一种新颖的方法,通过邻苯二甲酸酐和苯乙酮在碱的存在下反应,可以以高产率廉价地制备这些2-羧基二苯甲酮。这些2-羧基二苯甲酮可用作植物根地性反应的抑制剂、植物生长调节剂或含卤树脂的稳定剂。