67341-88-2

Upstream product

• 110-89-4 piperidine 
• 25751-82-0 2-(3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)malononitrile 
• 77380-03-1 Dicyano(piperidino)(3,5-ditert-butyl-4-hydroxyphenyl)methane 
• 3152-80-5 2,6-di-tert-butyl-4-[1,3]dithiolan-2-ylidene-cyclohexa-2,5-dienone 
• 77379-98-7 2,6-ditert-butyl-7,7-bis(dimethylamino)quinone methide 
• 163124-31-0 4-ethoxy(diethoxyphosphinoyl)methylene-2,6-di-tert-butyl-2,5-cyclohexadienone 
• 23093-92-7 cyano(piperidino)(3,5-ditert-butyl-4-hydroxyphenyl)methane 
• 7062-57-9 2,6-di-tert-butyl-4-(cyanomethylene)-2,5-cyclohexadien-1-one 
• 77380-02-0 2,6-ditert-butyl-7-cyano-7-piperidinoquinone methide 
• 128-39-2 2,6-di-tert-butylphenol 
• 149331-58-8 diethyl (α-ethoxy-3,5-di-tert-butyl-4-hydroxybenzyl)phosphonate 
• 128893-72-1 diethyl [(3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)methyl]phosphonate 

Relevant academic research and scientific papers

REACTIONS OF PHOSPHORYLATED 2,6-DI-tert-BUTYL-4-METHYLENE-2,5-CYCLOHEXADIENONES WITH NUCLEOPHILIC REAGENTS

4-Diethoxyphosphinoylmethylene- and 4-ethoxy(diethoxyphosphinoyl)methylene-2,6-di-tert-butyl-2,5-cyclohexadienones react with ethanol in the presence of catalytic amounts of sulfuric acid to form 1,6-addition products.In reaction of 4-ethoxy(diethoxyphosp

SYNTHESIS AND PROPERTIES OF 7,7-DIAMINOQUINONE METHIDES

Diaminoquinone methides Xa-Xe were prepared by aminolysis of the dicyanoquinone methide IX.From the isolated intermediates XI and XIII a four-step mechanism was deduced, involving addition and elimination steps in the order Ad-E-Ad-E.Condensation of N,N,N',N'-tetramethylchloroformamidinium chloride with 2,6-ditert-butylphenol afforded bis(dimethylamino)-quinone methide Xc which on transamination was converted to the diaminoquinone methides Xa and Xb.Analysis of physico-chemical data of diaminoquinone methides leads to the conclusion that their structure can be represented by the zwitterionic formula XVII rather than the quinonoid formula X.