N-C=O reversible N=C-O Rearrangement in the Heteroring of 4-Methyl-1-phenyl-2-(trimethoxysilylmethyl)-3-pyrazolidone

摘要

Proceeding with studies on the mutual effect of nitrogen-containing aromatic heterocycles and organo-silicon substituents SiX_3 bound with them [SiX_3 = Si(OMe)_3, SiF_3, Si(OCH_2CH_2)_3N] [1], we have prepared previously unknown 4-methyl-1-phenyl-2-(trimethoxysilyl)-3-pyrazolidone (I) and 4-methyl-1-phenyl-2-(silatranylmethyl)-3-pyrazolidone (II).