2813-23-2

Upstream product

• 94-30-4 ethyl 4-methoxybenzoate 
• 67-68-5 dimethyl sulfoxide 
• 100-07-2 4-methoxy-benzoyl chloride 
• 123-11-5 4-methoxy-benzaldehyde 
• 13350-29-3 1-Hydroxy-1-(4-methoxy-phenyl)-aethan-methyl-sulfoxid 

Downstream Products

• 1361298-24-9 8-bromo-2-(4-methoxyphenyl)pyrido[3,4-b]pyrazine 
• 1361298-31-8 N-[2-(4-methoxyphenyl)pyrido[3,4-b]pyrazin-8-yl]benzophenone imine 
• 1361298-36-3 8-amino-2-(4-methoxyphenyl)pyrido[3,4-b]pyrazine 
• 1361298-17-0 N-(2,5-dimethoxyphenyl)-2-(4-methoxyphenyl)pyrido[3,4-b]pyrazin-8-amine 
• 61161-13-5 4'-methoxy-2,2-bis(p-methoxyphenyl)acetophenone 
• 60112-43-8 (E)-methyl 4-hydroxy-4-(4-methoxyphenyl)-but-2-enoate 
• 32149-29-4 4-(4-methoxy-phenyl)-4-oxo-but-2-enoic acid methyl ester 
• 152423-69-3 1-(4-Methoxy-phenyl)-2,2,2-tris-methylsulfanyl-ethanone 
• 87228-61-3 S-methyl 2-(4-methoxyphenyl)-2-oxoethanethioate 
• 13603-51-5 2-hydroxy-1-(4-methoxyphenyl)-2-(methylsulfanyl)ethan-1-one 
• 100749-29-9 2-Methanesulfinyl-1,5-bis-(4-methoxy-phenyl)-pentane-1,5-dione 
• 122033-80-1 ω-(Methylthio)-ω-(methylsulfinyl)-p-methoxyacetophenone 
• 86988-54-7 2-(4-methoxyphenyl)pyrido<3,4-b>pyrazine 
• 52109-55-4 N-[2-(4-Methoxy-phenyl)-1-methylsulfanyl-2-oxo-ethyl]-benzamide 

Relevant academic research and scientific papers

Preparation method of beta-ketosulfoxide based on CaC2 catalysis

The invention provides a preparation method of beta-ketosulfoxide based on CaC2 catalysis, and belongs to the technical field of organic synthesis. In the presence of CaC2 or NaH or in the co-presence of CaC2 and TEA, acyl chloride and dimethyl sulfoxide react to prepare the beta-ketosulfoxide compound, the yield of beta-ketosulfoxide is 8.7-78%, and the yield of beta-ketosulfoxide in the reaction process of acyl chloride and dimethyl sulfoxide is remarkably improved. Particularly, in the coexistence of CaC2 and TEA, acyl chloride and dimethyl sulfoxide react to prepare the beta-ketosulfoxide compound, the yield of beta-ketosulfoxide is 45-78%, and the preparation method is green, environmentally friendly, mild in reaction process and simple to operate.

A convenient synthesis of novel 2,8-disubstituted pyrido[3,4-b]pyrazines possessing biological activity

A regioselective synthetic route to 2,8-disubstituted pyrido[3,4-b] pyrazines, by initial condensation reaction between suitable diaminopyridines and α-keto aldehydes equivalents, has been developed. Focusing on the functionalization on C-8, 2-aryl-8-bromo- and 8-amino-2-arylpyrido[3,4-b] pyrazines have been synthesized. Anilines, amides, and ureas have been introduced at the 8-position from key intermediates. 2,8-Disubstituted pyrido[3,4-b]pyrazines thus prepared were found to be of biological interest. Georg Thieme Verlag Stuttgart. New York.