1294500-71-2

Upstream product

• 67237-53-0 3-ethynylthiophene 
• 1294500-61-0 ethyl 1-phenyl-5-(3-thienylethynyl)-1H-pyrazole-4-carboxylate 
• 1294500-59-6 ethyl 1-phenyl-5-{[(trifluoromethyl)sulfonyl]oxy}-1H-pyrazole-4-carboxylate 
• 30588-33-1 5-hydroxy-1-phenyl-1H-pyrazole-4-carboxylic acid ethyl ester 

Downstream Products

• 1294500-73-4 5-hydroxy-1-phenyl-6-(3-thienyl)-1,5-dihydro-4H-pyrazolo[4,3-c]pyridin-4-one 

Relevant academic research and scientific papers

Ethyl 3- and 5-triflyloxy-1H-pyrazole-4-carboxylates in the synthesis of condensed pyrazoles by Pd-catalysed cross-coupling reactions

The easily obtainable title compounds ethyl 5- and 3-triflyloxy-1H- pyrazole-4-carboxylates (2 and 5) have been used as precursors in Sonogashira-type cross-coupling reactions with various alkynes to obtain the corresponding 5- and 3-alkynyl-4-(ethoxycarb