Reductive N-alkylation of 2,5-dimethyl-4-triphenylsilylpyridine over metal sulfides

The Re2S7 catalyst was proposed, and optimum conditions were established, for the selective hydrogénation of the pyridine ring in 2,5-dimethyl-4-triphenylsilylpyridine and its subsequent N-ethylation with ethanol, without involving the phenyl radicals attached to silicon. The Pt and Pd sulfides are less active under analogous conditions. © 1974 Consultants Bureau.