59775-57-4

Upstream product

• 2010-06-2 2-Amino-4-phenylthiazole 
• 104-88-1 4-chlorobenzaldehyde 
• 19350-69-7 4-chlorobenzaldehyde p-toluenesulfonylhydrazone 
• 59775-51-8 N-[(4-chlorophenyl)methylidene]-N-(4-phenyl-1,3-thiazol-2-yl)amine 

Downstream Products

• 59775-55-2 (4-chloro-phenyl)-(4-phenyl-thiazol-2-ylamino)-acetonitrile 
• 59775-51-8 N-[(4-chlorophenyl)methylidene]-N-(4-phenyl-1,3-thiazol-2-yl)amine 

Relevant academic research and scientific papers

Copper-catalyzed one-pot coupling reactions of aldehydes (ketones), tosylhydrazide and 2-amino(benzo)thiazoles: An efficient strategy for the synthesis of N-alkylated (benzo)thiazoles

An efficient and practical C–N bond formation methodology for the synthesis of N-alkylated (benzo)thiazoles was developed, via the copper-catalyzed one-pot two-step reactions of 2-amino(benzo)thiazoles and aldehydes (ketones) with tosylhydrazide. This cross-coupling reaction proceeded smoothly and tolerated a broad range of functional groups (46 examples). A variety of functionalized N-alkylated (benzo)thiazoles were obtained in moderate to high yields. Notably, gram-scale synthesis of fanetizole (anti-inflammatory drug) was also realized through this protocol.

Synthetic method for N-alkyl(benzo)thiazole

The invention provides a synthetic method for N-alkyl(benzo)thiazole. The synthetic method comprises the following steps: putting 0.4-0.8 mmol of a carbonyl compound, 0.4-0.8 mmol of p-toluenesulfonylhydrazide and 4-10 mL of a solvent in a flask and carrying out a reaction at 30 DEG C to 80 DEG C for 1 to 3 h; adding 0.4 mmol of 2-aminothiazole, 0.4-0.8 mmol of metal copper salt and 0.4-1.2 mmolof an alkali substance into the above reaction system, carrying out heating to 100 DEG C to 150 DEG C, and continuing the reaction for 2 h to 5 h; terminating the reaction to obtain a reaction productA; and subjecting the product A to purification and impurity separation so as to obtain pure N-alkyl(benzo)thiazole. According to the invention, the intermediate sulfonyl hydrazone is prepared from the carbonyl compound and sulfonyl hydrazide, and reacts with a 2-aminothiazole substance in the presence of a catalyst and under alkali conditions to obtain N-alkyl(benzo)thiazole. The synthetic method of the invention has the advantages of simple operation, low cost, high product yield and wide application range of a substrate. At the same time, the established method can also realize the synthesis of the anti-inflammatory drug fanetizole, and thus has high practical value.