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- W2952826114 abstract "A regiospecific cyclization-dehydration reaction of a 1-[(4-(N-alkyl-N-(tert-butyloxycarbony)amino)-phenyl]-4,4,4-trifluorobutane-1,3-done with a 4-aminosulfonyl-, or 4-methylsulfonyl-, phenylhydrazine hydrochloride in refluxing ethanol proceeded with simultaneous loss of the N-tert-butyloxycarbonyl protecting group to afford a group of 1-(4-methanesulfonylphenyl or 4-aminosulfonylphenyl)-5-[4-(N-alkylaminophenyl)]-3-(trifluoromethyl)-11H-pyrazoles(6). Subsequent reaction of the pyrazole 6 (R1 = R2 = Me) with nitric oxide (40 psi) proceeded via a N-methylamino-N-diazen-1-ium-1,2-diolate intermediate that undergoes protonation of the more basic diazen-1-ium-1,2-diolate N2-nitrogen and then loss of a nitroxyl (HNO) species to furnish the N-nitroso product 7." @default.
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- W2952826114 date "2008-11-01" @default.
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- W2952826114 title "Synthesis of new 1-[4-methane(amino)sulfonylphenyl)]-5-[4-(aminophenyl)]-3-trifluoromethyl-1H-pyrazoles" @default.
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- W2952826114 doi "https://doi.org/10.1002/jhet.5570450623" @default.
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