98832-64-5Relevant academic research and scientific papers
A GENERAL METHOD FOR THE SYNTHESIS OF 1-SUBSTITUTED (OR UNSUBSTITUTED)-4-CARBOMETHOXY-2-IMIDAZOLIN-5-ONES
Hosmane, Ramachandra S.,Lim, Benjamin B.
, p. 1915 - 1918 (2007/10/02)
A general method for the synthesis of the title compounds by employing the reagent methyl N-(dicarbomethoxymethyl)methanimidate is described.The preparation, properties and reactions of the reagent are also reported.
Reagents for Bioorganic Synthesis. 2. Methyl N-(Dicarboxymethyl)methanimidate
Lim, Benjamin B.,Hosmane, Ramachandra S.
, p. 5111 - 5115 (2007/10/02)
Preparation, properties, and reactions of the reagent methyl N-(dicarbomethoxymethyl)methanimidate (1) are reported.Dropwise addition of dimethyl aminomalonate to refluxing trimethyl orthoformate/TFA afforded 1.Treatment of 1 with ammonia and various primary amines gave the corresponding unsubstituted and 1-substituted 4-carbomethoxy-5-hydroxyimidazoles 7-12, either as the parent hydroxy compounds (a) or as the (alkyl)ammonium salts (b).The reaction of 1 with water and sodium hydrosulfide provided dimethyl N-formylaminomalonate (13) and dimethyl N-(thioformyl)aminomalonate (14), respectively.The reaction of 1 with excess sodium hydrosulfide resulted in the formation of methyl N-(thioformyl)aminoacetate (17).Conversions of methylammonium 4-carbomethoxy-1-methylimidazol-5-olate (8b) and benzylammonium 4-carbomethoxy-1-benzylimidazol-5-olate (9b) into 5-(benzylamino)-4-(benzylcarbamoyl)-1-methylimidazole (18) and 1-benzyl-5-(benzylamino)-4-(benzylcarbamoyl)imidazole (19), respectively, were each accomplished in a single-pot procedure, employing phenylphosphonic dichloride as the key reagent.
