title: 1-Hydroxy-1H-benzo[d][1,2,6]oxazaborinin-4(3H)-one.
abstract: The structure of the title compound, C(7)H(6)BNO(3), 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 ortho 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.
authors: Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616-5292, USA.
authors: Evan A
authors: EA
authors: Sarina
authors: Marilyn M
authors: MM
authors: Olmstead
authors: Dung N
authors: DN
authors: Nguyen
authors: Michael P
authors: MP
authors: Groziak