Romazarit sodium, Ro-31-3948/002
氯马扎利Chemical Name: 2-[[2-(4-Chlorophenyl)-4-methyl-5-oxazolyl]methoxy]-2-methylpropionic acid sodium salt
CAS No. 109543-76-2 (free acid)
项目整合开发状态: Phase II
项目研究机构: Roche (Originator)
合成路线:Romazarit (sodium salt) is prepared by a 7-step process from 4-chlorobenzoic acid,ethyl 2-chloroacetoacetate (VIII) and ethyl 2-methyl 2-hydroxypropionate (X).Reaction of the sodium salt of 4-chlorobenzoic acid (I) with ethyl 2-chloroacetoacetate (VIII) affords ethyl 3-oxo-2-(4-chlorophenylcarboxy)butyrate (II).Cyclization of (II) to ethyl 2-(4-chlorophenyl)-4-methyloxazole-5-carboxylate (III) is accomplished by treatment with formamide (IX)/sulfuric acid.Reduction of the ester (III) with lithium aluminum hydroxide in tetrahydrofuran yields 2-(4-chlorophenyl)-4-methyl-5-oxazolemethanol (IV).Chlorination of alcohol (IV) with thionyl chloride followed by reaction of crude chloromethyloxazole (V) with the sodium alkoxide derivative of ethyl 2-methyl-2-hydroxypropionate (X) yields ethyl [2-[(4-chlorophenyl)-4-methyl-5-oxazolyl]methoxy]-2-methylpropionate (VI).Hydrolysis of the ester (VI),acidification and recrystallization affords Ro 31-3948 (VII) as a white solid,which is converted to the sodium salt by treatment with sodium isopropoxide in isopropanol.
📌 参考资料/链接：
参考文献标题:ROMAZARIT SODIUM < Prop INNM; BAN >
文献作者:Bradshaw,D.; Sedgwick,A.D.; Self,C.R.
参考来源:Drugs Fut 1989,14(9),867
📄 详细内容
合成路线:A new synthesis of romazarit sodium has been published:By reaction of 2-(4-chlorophenyl)-4-methyl-5-oxazolemethanol (I) with acetone,chloroform and NaOH at reflux temperature.Compound (I) is already known (see original monograph).Romazarit sodium represents a novel type of antiinflammatory drug with oral activity in models of chronic inflammation,in which it has shown clinical and biochemical effects.Romazarit sodium is now in phase II trials in patients with rheumatoid arthritis.
参考文献标题:Romazarit: A potential disease-modifying antirheumatic drug
文献作者:Self,C.R.; Machin,P.J.; Barber,W.E.; et al.
参考来源:J Med Chem 1991,34(2),772--7
合成路线:Romazarit (sodium salt) is prepared by a 7-step process from 4-chlorobenzoic acid,ethyl 2-chloroacetoacetate (VIII) and ethyl 2-methyl 2-hydroxypropionate (X).Reaction of the sodium salt of 4-chlorobenzoic acid (I) with ethyl 2-chloroacetoacetate (VIII) affords ethyl 3-oxo-2-(4-chlorophenylcarboxy)butyrate (II).Cyclization of (II) to ethyl 2-(4-chlorophenyl)-4-methyloxazole-5-carboxylate (III) is accomplished by treatment with formamide (IX)/sulfuric acid.Reduction of the ester (III) with lithium aluminum hydroxide in tetrahydrofuran yields 2-(4-chlorophenyl)-4-methyl-5-oxazolemethanol (IV).Chlorination of alcohol (IV) with thionyl chloride followed by reaction of crude chloromethyloxazole (V) with the sodium alkoxide derivative of ethyl 2-methyl-2-hydroxypropionate (X) yields ethyl [2-[(4-chlorophenyl)-4-methyl-5-oxazolyl]methoxy]-2-methylpropionate (VI).Hydrolysis of the ester (VI),acidification and recrystallization affords Ro 31-3948 (VII) as a white solid,which is converted to the sodium salt by treatment with sodium isopropoxide in isopropanol.
参考文献标题:Oxazole and isoxazole derivatives having anti-arthritic activity.
文献作者:Self,C.R.; Machin,P.J.; Osbond,J.M.; Smithen,C.E.; Tong,B.P.(Hoffmann-La Roche,Inc.)
参考来源:EP 0220573; ES 2002420; ES 2010537; US 4774253
产品链接: CAS No. 109543-76-2››