201733-56-4Relevant articles and documents
Stability and decomposition of copper(i) boryl complexes: [(IDipp)Cu-Bneop], [(IDipp?)Cu-Bneop] and copper clusters
Borner, Corinna,Drescher, Wiebke,Kleeberg, Christian
, p. 14957 - 14964 (2021)
The NHC copper boryl complexes [(IDipp)Cu-Bneop] (2) and [(IDipp?)Cu-Bneop] (3) (IDipp = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene, IDipp? = 1,3-bis(2,6-(diphenylmethyl)-4-methylphenyl)imidazol-2-ylidene, neop = (OCH2)2CMe2) were synthesised and fu
Borylation of organo halides and triflates using tetrakis(dimethylamino) diboron
Bello, Charles S.,Schmidt-Leithoff, Joachim
, p. 6230 - 6235,6 (2012/12/11)
We report a new in situ borylation method using tetrakis(dimethylamino) diboron, DMA4B2, in the presence of a diol. Our method uses standard borylation conditions and readily available Pd-catalysts. The scope of this method includes aryl halides and triflates as well as vinyl halides and triflates. The method successfully works with a broad range of diols, enabling the selection of the best boronic ester for subsequent Suzuki coupling.
Bis-Catecholate, Bis-Dithiocatecholate, and Tetraalkoxy Diborane(4) Compounds: Aspects of Synthesis and Electronic Structure
Lawlor, Fiona J.,Norman, Nicholas C.,Pickett, Nigel L.,Robins, Edward G.,Nguyen, Paul,Lesley, Gerry,Marder, Todd B.,Ashmore, Jennifer A.,Green, Jennifer C.
, p. 5282 - 5288 (2008/10/08)
The synthesis and characterization of a series of bis-catecholate diborane(4) compounds, B2(1,2-O2C6H4)2 (3), B2(1,2-O2-4-MeC6H3)2 (7), B2(1,2-O2-4-MeC6H3)2 (7), B3(1,2-O2-4-ButC6H3) 2 (8), B2(1,2-O2-3,5-Bu2tC 6H2)2 (9), B2(1,2-O2-3-MeOC6H3)2 (10), bis-dithiocatecholate diborane(4) compounds, B2(1,2-S2C6H4)2 (13), B2(1,2-S2-4-MeC6H3)2 (14), and tetraalkoxy diborane(4) compounds, B2(OCH2CMe2CH2O)2 (11) and B2(OCMe2CMe2O)2 (12) from B2(NMe2)4 (1) is described, as are the bis(NHMe2) adducts of 3 and 9, namely [B2(1,2-O2C6H4) 2-(NHMe2)2] (4) and [B2(1,2-O2-3,5-Bu2tC 6H2)2(NHMe2)2] (5). The latter two compounds are intermediates in the formation of 3 and 9 from 1. Compound 1 is synthesized by reductive coupling of BCl(NMe2)2, which in turn is prepared from reaction of BCl3 with B(NMe2)3 in a 1:2 stoichiometry. We have also characterized [B2Cl4-(NHMe2)2] (15) formed from addition of HCl to 1 prior to complete reaction with diols, and the salt, [NH2Me2]-[B(1,2-O2C6H 4)2] (16), which arises from addition of cacechol to B(NMe2)3. Thus, any B(NMe2)3 impurity present after the preparation of 1 needs to be removed by distillation prior to reaction with alcohols. The dimer, [BCl2-(μ-NMe2)]2 (17) has also been characterized. This is formed from reaction of BCl3 with B(NMe2)3 if a 2:1 rather than 1:2 sloichiometry is used. Photoelectron spectra of 1, 3, 8, 11, and 12 are reported along with those of the corresponding diols, catechol, 4-But-catechol, 2,2-dimethyl-1,3-propanediol, and pinacol. The ionization energies of the B2(OR)4 compounds follow the series 8 2N4 framework increases the IE by ca. 1.65 eV, whereas the presence of an aromatic ring rather than an aliphatic chain decreases the IE by ca. 1.50 eV. The presence of electron donating But-groups also decreases the IE.
