| | 1 | Author
| Andreas Ansorge, DavidJ. Brauer, Hans Bürger, F. Rank Dörrenbach, Burkhard Krum, G. Ottfried Pawelke | Requires cookie* | | | Title
| Complexes of (CF3)3B with Sterically Crowded Amines. Unexpected Side Products from the Trifluoromethylation of Cl2BN(f-Bu)(Bz). Crystal and Molecular Structures of (CF3)3BN H(CH 2)6, H O (CF3)2BCH(Ph)NH(f-Bu)(Bz) and Ph(CF3)2BCHN(f-Bu)(Bz)  | | | | Abstract
| Trifluoromethylation o f C12B N (C H 2)6, Cl2B(tmp), tmp = 2,2,6,6-tetramethylpiperidino, and CLBN(r-Bu)(Bz) with three equivalents o f C F3Br/P(NEt2)3 yields the amine complexes (C F 3)3B N H (C H 2)6 (1), (C F 3)3B • N H 2CM e2(CH 2)2CH C M e2 (2) and (C F 3)3B N H 2(Bz) (3). The preparation o f 3 was accompanied by formation o f three unexpected trifluoro-methylboron derivatives X (C F 3)2BCH(Ph)NH(r-Bu)(Bz) (D), X = Br (4), Cl (5), and (Ph)(C F3)2BCH N(/-Bu)(Bz) (6), the latter being formed from 4 by HBr elim ination and rear rangement. Reaction o f 4 with H 20 , EtOH, H C O N M e2 and M e3SnH yielded D, X = OH (7), EtO (8), HCOO (9), and (Ph)(CF3)2BCH2N H (/-Bu)(Bz) (10), respectively. The structures o f 1, 6 and 7 have been determined by X-ray diffraction analysis. | | | |
Reference
| Z. Naturforsch. 47b, 772—7 (1992); received November 6 1991 | | | |
Published
| 1992 | | | |
Keywords
| Trifluoromethylation, Borane-Amine Complexes, X-Ray | | | |
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| 47 | |
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