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- W2954344614 abstract "Abstract Reaction of ethyl 3‐nitropropionate with aryldiazonium chlorides in basic medium yields ethyl 3‐nitro‐3‐(arylhydrazono)propionates. These α‐nitrohydrazones are converted by catalytic hydrogenation to 3‐amino‐1‐aryl‐2‐pyrazolin‐5‐ones, probably via cyclization of intermediate amidrazones produced in situ . This appears to be the first route to the title compounds that does not use a substituted phenyl hydrazine intermediate and offers advantages in the preparation of pyrazolinones bearing electron‐rich aryl rings." @default.
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- W2954344614 date "1983-05-01" @default.
- W2954344614 modified "2023-09-26" @default.
- W2954344614 title "A new synthesis of 3-amino-1-aryl-2-pyrazolin-5-ones" @default.
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- W2954344614 doi "https://doi.org/10.1002/jhet.5570200351" @default.
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