112817-48-8Relevant articles and documents
Aminoiminoboranes as Synthons for the Preparation of Three- and Four-Membered Rings with the Ring-Atom Sequence BNE, BNBE, BNSiE, and NBNE (E = P, Partly also B, Si, Ge, As)
Bonn, Karl-Heinz van,Schreyer, Peter,Paetzold, Peter,Boese, Roland
, p. 1045 - 1058 (2007/10/02)
Dihalides AHal2 add to the iminoborane iPr2NBNtBu (1a) to give diaminoboranes iPr2NB(Hal)N(tBu)-AHal (2a-i) and the triaminoborane (iPr2N)2BN(tBu)-AsBr2 (2j); by the substitution of Hal by NiPr2 or Me in 2e, f, j the derivatives 2k-m are formed.With the aid of alkali metal, the diaminoboranes 2a, c, d, m are dehalogenated to the three-membered ring compounds N(tBu)-A-> with A = B(NiPr2) (3), SiR2 (4a, b), P(NiPr)2 (5), whereas the dechlorination of 2a, c with Li2EPh (E = P, As) yields the four-membered ring products N(tBu)-A-E(Ph)-> with A = B(NiPr2) (6, 7), SiMe2 (8, 9).Dichlorides ACl2 are added to the iminoborane Me3Si(tBu)NBNtBu (1b) to give either the diaminoboranes Me3Si(tBu)NB(Cl)N(tBu)-ACl (2n-w) or the four-membered rings B(Cl)N(tBu)-A-> with A = GeMe2 (12), PX (13a-e), AsCl (14a), Me3SiCl being a second product.The same type of ring compound with A = BX (10a-d), SiX2 (11a, b) is formed from 2n-s during the elimination of Me3SiCl by the action of the solvent chloroform at room temperature.The Cl atom in these ring compounds can be substituted by alkyl, amino, or alkoxy groups to give 10e, f, 13f-h, 14b-j.The configuration and conformation of the products in solution and the structure of 3, 6, 7, 12, 14b in the solid state are discussed on the basis of NMR and X-ray data, respectively.
