1‐Hydroxy‐1H‐benzo[d][1, 2, 6]oxazaborinin‐4(3H)‐one. (5th February 2013)

• Record Type: Journal Article
• Authors: Sarina, Evan A.; Olmstead, Marilyn M.; Nguyen, Dung N.; Groziak, Michael P.
• Is Part Of: Acta crystallographica. Volume 69:Part 2(2013:Feb.)
• Page Start: 183
• Page End: 185
• Publication Date: 2013-02-05
• Subjects: Crystallography -- Periodicals; Crystals -- Periodicals; 548.05
• DOI: 10.1107/S0108270113000681
• Languages: English
• ISSNs: 0108-2701

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The structure of the title compound, C₇H₆BNO₃, a new boron heterocycle, prepared by the condensation of (2‐ethoxycarbonylphenyl)boronic acid and hydroxylamine, reveals the specific mode of intramolecular condensation between a phenylboronic acid and an <italic>ortho</italic> hydroxamic acid substituent. The crystal structure shows that dehydration occurs to form a planar oxazaborinine ring possessing both phenol‐like B—O—H and lactam functional groups. In the extended structure, intermolecular hydrogen bonding generates a 14‐membered ring. To our knowledge, this is the first crystal structure determination involving a six‐membered ring that exhibits consecutive B—OH, O, NH, and C=O functional groups.</p> </abstract>