✦ LIBER ✦

4-{[3,5-Bis(methoxycarbonyl)-4,5-dihydro-1H-pyrazol-5-yl]methylamino}pyridine 1-oxide monohydrate

✍ Scribed by Hostetler, Katherine J. ;Poole, James S. ;Fanwick, Phillip E.

Publisher: International Union of Crystallography
Year: 2006
Tongue: English
Weight: 147 KB
Volume: 62
Category: Article
ISSN: 1600-5368
DOI: 10.1107/s1600536806021970

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✦ Synopsis

The title compound, C~13~H~16~N~4~O~5~·H~2~O, was isolated following the cycloaddition reaction of 4-azidopyridine 1-oxide with an excess of methyl acrylate. The compound arises from a reaction sequence whereby the expected triazoline product undergoes rearrangement and a second cycloaddition reaction to yield the title pyrazoline product without the presence of a strong base which is usually required for such transformations.

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4-{[3,5-Bis(methoxy­carbon­yl)-4,5-dihydro-1H-pyrazol-5-yl]methyl­amino}pyridine 1-oxide monohydrate

✦ Synopsis

4-{[3,5-Bis(methoxycarbonyl)-4,5-dihydro-1H-pyrazol-5-yl]methylamino}pyridine 1-oxide monohydrate