PGE-2946979

Chemical Name: 4-(Benzyloxycarbonyl)-1-(4-methoxyphenylsulfonyl)piperazine-2(R)-carbohydroxamic acid
CAS No. 204139-85-5 (undefined isomer)
项目整合开发状态: Preclinical
项目研究机构: Procter & Gamble (Originator)
合成路线:The selective protection of piperazine-2-carboxylic acid (I) with tert-butoxycarbonyl anhydride gives the carbamate (II),which is sulfonated with 4-methoxybenzenesulfonyl chloride (II) and triethylamine yielding the sulfonamide (IV).The esterification and simultaneous deprotection of (IV) with SOCl2 and methanol affords the methyl ester (V),which is treated with benzyl chloroformate (VI) and triethylamine to afford the benzyloxycarbonyl derivative (VII).Finally,this compound is treated with KOH and hydroxylamine in methanol to provide the target hydroxamic acid.

合成路线:The selective protection of piperazine-2-carboxylic acid (I) with tert-butoxycarbonyl anhydride gives the carbamate (II),which is sulfonated with 4-methoxybenzenesulfonyl chloride (II) and triethylamine yielding the sulfonamide (IV).The esterification and simultaneous deprotection of (IV) with SOCl2 and methanol affords the methyl ester (V),which is treated with phosgene and N-benzyl-N-methylamine (VI) to afford the cyclic urea derivative (VII).Finally,this compound is treated with KOH and hydroxylamine in methanol to provide the target hydroxamic acid.