N-(1-amino-3-methyl-1-oxobutan-2-yl)-1-(cyclohexylmethyl)-3-(cyclohexylmethyl)-3-(cyclohexylmethyl)-3-(cyclohexylmethyl)-3-(cyclohexylmethyl (4-fluorophenyl) 3,5-AB-CHMFUPPYCA was named after the -1H-pyrazole-5-carboxamide. This’research chemical’ was bought from a UK-based Internet dealer who incorrectly billed it as AZ-037, which would have been associated with (S) -N-(1-amino-3-methyl-1-oxobutan-2-yl) -1-(5-fluoropentyl) -5-(4-fluorophenyl) -1H-pyrazole-3-carboxamide.
The pyrazole core implies a bioisosteric substitution of an indazole ring, which is common in synthetic cannabinoids from the PINACA, FUBINACA, and CHMINACA family. The pyrazole ring system in 3,5-AB-CHMFUPPYCA produces the regioisomer N-(1-amino-3-methyl-1-oxobutan-2-yl)-1-(cyclohexylmethyl)-5-(4-fluorophenyl)-1H-pyrazole-3-carboxamide (called 5,3-AB-CHMFUPPYCA), and both isomers were synthesized utilizing two different techniques, Both isomers could be easily distinguished.
During the synthesis of 3,5-AB-CHMFUPPYCA, a route specific chlorine-containing by-product was also noticed and characterized as N-(1-amino-3-methyl-1-oxobutan-2-yl)-4-chloro-1-(cyclohexylmethyl)-3- (4-fluorophenyl) -1H-pyrazole-5-carboxamide. Chromatographic, spectroscopic, mass spectrometric platforms, as well as crystal structure analysis, were all used in the complete analytical characterisation. The first reports of the syntheses and analytical characterizations of both AB-CHMFUPPYCA isomers serve as a reminder that the prospect of’research compounds’ being mislabeled cannot be ruled out. Both AB-CHMFUPPYCA isomers have pharmacological actions that have yet to be discovered.
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The pyrazole core implies a bioisosteric substitution of an indazole ring, which is common in synthetic cannabinoids from the PINACA, FUBINACA, and CHMINACA family. The pyrazole ring system in 3,5-AB-CHMFUPPYCA produces the regioisomer N-(1-amino-3-methyl-1-oxobutan-2-yl)-1-(cyclohexylmethyl)-5-(4-fluorophenyl)-1H-pyrazole-3-carboxamide (called 5,3-AB-CHMFUPPYCA), and both isomers were synthesized utilizing two different techniques, Both isomers could be easily distinguished.
