PREPARATION METHOD FOR THERMO STABLE COMPOUND

摘要

A novel thermo stable compd. is prepd. by reacting monohydroxy aromatic aldehyde substd. by inactive gp. (not contg. aldehyde gp., against condensn. rxn. between methyl pyridine or pyrazine with ortho and para psition from hydroxy gp.) with methyl pyridine or pyrazine of formula (I). In the formula, Z=N, C-CH3, C-CH2-CH3 or CH, R=H, Me or Et, however, total number of Me gp. substd. on the pyridine or pyrazine is 2-4.