申请人:Lever Brothers Company
公开号:US04701527A1
公开(公告)日:1987-10-20
A method of synthesizing with improved reaction kinetics and improved effective yields salicylamide compounds of the formula: ##STR1## wherein R.sub.1 is a substituent selected from the group consisting of --H, --COC.sub.n H.sub.2n+1 and --C.sub.n H.sub.2n+1 wherein n is an integer with a value of from 1 through to about 15, R.sub.2 is a substituent selected from the group consisting of --H, --CN, --NO.sub.2, --F, --Cl, --Br, --I, --CF.sub.3, --CBr.sub.3, --CCl.sub.3, --CI.sub.3 and R.sub.1 and R.sub.3 is an R.sub.2 substituted heterocyclic compound selected (e.g.) from the group consisting of furan, thiazole, benzothiazole and purine which comprises reacting a phenyl salicylate ester bearing an R.sub.1 substituent on the benzene ring of the salicylic acid portion thereof with an R.sub.2 substituted aniline or a heterocyclic amine NH.sub.2 --R.sub.3 and with a Lowry-Bronsted acid catalyst, optionally in the presence of an inert solvent such as a halogenated or unhalogenated aromatic compound or a polyethylene glycol of average molecular weight 1000 to 6000 or mixtures thereof at a temperature of above about 150.degree. C. for about one half to about 4 hours. When the Lowry-Bronsted acid catalyst takes the form of the hydrochloride salt of the reactant aniline or heterocyclic amine the amount of the free reactant aniline or heterocyclic amine is reduced proportionately.
一种合成改良反应动力学和提高有效产率的水杨酰胺化合物的方法,其化学式为:其中R₁是从--H、--COCₙH₂ₙ₊₁和--CₙH₂ₙ₊₁中选择的取代基,其中n是从1到约15的整数值,R₂是从--H、--CN、--NO₂、--F、--Cl、--Br、--I、--CF₃、--CBr₃、--CCl₃、--CI₃和R₁和R₃是从噁唑、噻唑、苯并噻唑和嘌呤等中选择的R₂取代的杂环化合物,包括将苯基水杨酸酯与其苯环上带有R₁取代基的R₂取代苯胺或杂环胺NH₂—R₃反应,并加入Lowry-Bronsted酸催化剂,在惰性溶剂的存在下,如卤化或非卤化芳香化合物或平均分子量为1000至6000的聚乙二醇或其混合物中,在约150摄氏度以上的温度下反应约半小时至4小时。当Lowry-Bronsted酸催化剂采用反应苯胺或杂环胺的盐酸盐形式时,自由反应苯胺或杂环胺的量相应减少。