106237-26-7

Upstream product

• 106256-68-2 4-Chloro-N-((E)-1-methyl-3-oxo-propenyl)-N-p-tolyl-benzamide 
• 78486-50-7 1-(p-methylphenylamino)-3-(p-methylphenylimino)-1-butene hydrochloride 
• 83583-95-3 1-N-(p-chlorobenzoyl)-p-methylphenylamino-3-(p-methylphenylimino)-1-butene 
• 106237-32-5 3--1-(p-methylphenylimino)-2-butene 
• 83583-97-5 1--3-(p-methylphenylimino)-1-butene 
• 83583-96-4 1,3-bis-1,3-butadiene 
• 78486-52-9 1-(p-methylphenylamino)-3-(p-methylphenylimino)-1-butene 
• 78486-46-1 1-(N-benzoyl-p-methylphenyloamino)-3-(p-methylphenylimino)-1-propene 
• 78486-51-8 1,3-bis(N-benzoyl-p-toluidino)-1,3-butadiene 
• 83584-02-5 C₁₈H₂₀N₂ 

Downstream Products

• 877-43-0 2,6-dimethylquinoline 

Relevant academic research and scientific papers

Preparation and Cyclodehydration of β-Arylaminocrotonaldehyde

β-Arylaminocrotonaldehydes (3) were prepared by alkaline hydrolysis of 1-arylamino-3-arylimino-1-butenes (2).On treatment with sulfuric acid, β-anilinocrotonaldehyde (3b) and p-methyl- (3a), m-chloro- (3c), and p-chloro- (3d) derivatives were cyclodehydrated to give the corresponding quinaldines in quantitative yields.The protonation of 3 was proved to take place at the oxygen atom on the basis of spectral evidence.The mechanism of the cyclodehydration is discussed.Keywords-Combes reaction; cyclodehydration; hydrolysis; β-arylaminocrotonaldehyde; 1-arylamino-3-arylimino-1-butene; quinaldine derivative; protonation

Hydrolysis of Acyl Derivatives of Malonaldehyde Dianil. IV. Preparation of β-(p-Toluidino)crotonaldehyde

β-(p-Toluidino)crotonaldehyde (V), a possible reactant of the Combes reaction, was prepared by the alkaline hydrolysis of β-N-(p-chlorobenzoyl)-p-toluidinocrotonaldehyde (XXIV).Compound XXIV was prepared by the hydrochloric acid-catalyzed hydrolysis of 3-