p-Methoxyphenyltellurium trichloride has been prepared by condensation of tellurium tetrachloride with anisole. This p-methoxyphenyltellurium trichloride has been investigated as a catalyst in knoevenagel reactions between non-enolisable aldehydes and active methylene compounds to yield the corresponding olefinic products. This paper reports the reaction of ethylcyanoacetate, malononitrile and cyanoacetamide with aromatic aldehydes, ArCHO ( Ar is C6H5 , 4-ClC6H4 , 4-CH3OC6H4 , and C6H5-CH=CH ) . The products are obtained in excellent yield and high purity and have been identified by comparison of their properties with those of authentic samples.
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