7019-95-6

Usage

InChI:InChI=1/C20H31NO/c1-19(2,3)16-12-15(14-21-10-8-7-9-11-21)13-17(18(16)22)20(4,5)6/h12-14H,7-11H2,1-6H3

Upstream product

• 110-89-4 piperidine 
• 1620-98-0 3,5-di-t-butyl-4-hydroxybenzaldehyde 
• 880-09-1 di(N-piperidinyl)methane 
• 19382-02-6 4-hydroxy-3,5-di-tert-butylbenzylidene dichloride 

Downstream Products

• 1415497-91-4 2,6-di-tert-butyl-4-(3-phenyl-1-(piperidin-1-yl)prop-2-ynyl)phenol 
• 7062-57-9 2,6-di-tert-butyl-4-(cyanomethylene)-2,5-cyclohexadien-1-one 
• 23093-92-7 cyano(piperidino)(3,5-ditert-butyl-4-hydroxyphenyl)methane 

Relevant academic research and scientific papers

SYNTHESIS OF 7-ACETYLENO QUINONE METHIDE DERIVATIVES AND THEIR APPLICATION AS VINYLIC POLYMERIZATION RETARDERS

The invention provides a method for synthesizing 7-Acetyleno quinone methide compounds that is safe and inexpensive. The method avoids the need for extremely cold reaction temperatures and unlike the prior art does not require any highly explosive materials. The method comprises the steps of a) performing a condensation reaction between 3,5-di-tert-butyl-4-hydroxybenzaldehyde and a secondary amine thereby forming a secondary amine quinone methide intermediate;b) removing water from the secondary amine quinone methide intermediate by azeotropic distillation;c) adding the dehydrated secondary amine quinone methide intermediate to an organic medium containing a metal acetylide to form a Mannich base intermediate; andd) adding a release agent to the Mannich base intermediate to yield a 7-Acetyleno quinone methide.

Easy large scale syntheses of 2,6-di-t-butyl7-cyano-, 7-carboxy- and 7- methoxycarbonyl quinone methides

Easy large scale syntheses of 2,6-di-t-butyl-7-cyano-, 7-carboxy- and 7- methoxycarbonyl quinone methides 1-3 using cheap and readily available starting materials have been developed.