Oxa-azonia-boratacyclopentanes by Insertion of Dimethylaminobis(trifluoromethyl)borane into Epoxides
Open Access
- 1 July 1993
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 48 (7) , 935-939
- https://doi.org/10.1515/znb-1993-0714
Abstract
Dimethylaminobis(trifluoromethyl)borane, (CF3)2BNMe2 (A), reacts with epoxides of the general formula to yield five-membered heterocycles (CF3)2 , R = Me (1), CH,F (2), CF3 (3), Et (4), Bz (5). With R = Ph a 1:2 mixture of the isomers (CF3)2 O (6a) and (CF3)2 (6b) is obtained. To the contrary, and A form the borane-dimethylamine adduct (H2C=CMe—CH2-O)(CF3)2B • NHMe2 (7). The compounds have been characterized by elemental analyses, multinuclear NMR, IR and mass spectra.Keywords
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