Aliphatic esters of b-(2, 2-dimethylhydrazino) propionic acid were synthesized by reaction of 1, 1-dimethylhydrazine with the corresponding alkyl acrylates [1, 2]. Methyl acrylate is known to react with 1, 1-dimethylhydrazine in polar solvents (water, alcohol), affording a cyclic adduct, 1, 1-dimethyldihydro-pyrazol-1-ium-3-olate [1]. In the reaction of an organosilicon acrylate, 1, 3-bis (acryloyloxymethyl)-1, 1, 3, 3-tetramethyldisiloxane with 1, 1- ...