Patent ID: 8884038

Claim:
A method for the synthesis of 7-Acetyleno quinone methides, the method comprising the steps of: a) performing a condensation reaction between a 3,5-di-substituted-4-hydroxybenzaldehyde and a secondary amine thereby forming a secondary amine quinone methide intermediate; b) removing water from the secondary amine quinone methide intermediate in a high boiling point hydrocarbon solvent by azeotropic distillation at a temperature of between 100 and 160° C., said hydrocarbon solvent being one from the group consisting of an aliphatic solvent, an aromatic solvent, and any combination thereof; c) adding the dehydrated secondary amine quinone methide intermediate to an organic medium containing a metal acetylide to form a Mannich base intermediate, and d) adding a release agent to the Mannich base intermediate to yield a 7-Acetyleno quinone methide.