John A. Mikroyannidis
1982
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Abstract
Abstract 2-Imidazolidinone or 2-imidazolidinethione reacts with aldehydes and phosphorous acid triesters to form substituted 1-[(phosphonyl)methyl]-2-imidazolidinones and 1,3-bis[(phosphonyl)methyl]-2-imidazolidi-nones or their thio-analogous compounds. 2-Pyrrolidinone reacts in the same way to form substituted 1-[(phosphonyl)methyl]-2-pyrrolidinone. Acid catalysis promotes these reactions in some cases. Triaryl phosphites are more reactive than trialkyl phosphites in this process. The substituted 1-[(phosphonyl)-methyl]-2-imidazolidinones undergo an acid-catalyzed hydrolysis of their phosphonyl ester groups more readily than the corresponding substituted 1,3-bis[(phosphonyl)methyl]-2-imidazolidinones.