title: A boron-containing estrogen mimic.
abstract: A prototype of a new class of 2,3,1-benzodiazaborine-based estrogen mimics is described. 1,2-Dihydro-1,6-dihydroxy-2-(2-methoxy-6-pyridyl)-2,3,1-benzodiazabor ine, (6), was obtained as a crystalline monohydrate (C13H12BN3O3.H2O) after regioselective BBr3-mediated O-demethylation of the condensation product formed from 2-formyl-4-methoxybenzeneboronic acid and 2-hydrazino-6-methoxypyridine. As intended by design, the solid-state structure of (6) features an intramolecular hydrogen-bond association between the donor B--OH group and the acceptor pyridine ring N, a connection which constitutes an additional 'virtual' six-membered ring, thereby providing for an overall topography closely matching that of a tetracyclic steroid. Specifically, prototype (6) can be viewed as a boron-containing mimic of the O17-methyl ether derivatives of dihydroequilenin or estradiol.
authors.affiliation: Department of Geology, Southern, Illinois University-4324, Carbondale 62901, USA. paul@geo.siu.edu
authors.forename: P D
authors.initials: PD
authors.lastname: Robinson
authors.forename: M P
authors.initials: MP
authors.lastname: Groziak
mesh_terms: D001372:Aza Compounds / Q000737:chemistry* / Q000494:pharmacology; D001896:Boron Compounds / Q000737:chemistry* / Q000494:pharmacology; D018360:Crystallography, X-Ray; D004967:Estrogens / Q000494:pharmacology; D006860:Hydrogen Bonding; D018716:Molecular Mimicry; D015394:Molecular Structure
chemical_list: C402963:1,2-dihydro-1,6-dihydroxy-2-(2-methoxy-6-pyridyl)-2,3,1-benzodiazaborine; D001372:Aza Compounds; D001896:Boron Compounds; D004967:Estrogens