- Process for synthesizing diethyl alkoxy borane
-
The invention discloses a process for synthesizing diethyl alkoxy borane and belongs to the field of boron chemical synthesis. A 2-2.2 equivalent ethyl Grignard reagent or lithium ethide and a boronizing reagent react, quenching is carried out after the reaction is completed, alcohol and a dehydrating solvent are added into the obtained intermediate, and diethyl alkoxy borane is obtained after rectification. Raw materials are easy to obtain, and the method is convenient to operate and very suitable for industrial enlarged synthesis.
- -
-
Paragraph 0012
(2017/02/17)
-
- Syntheses, structures, and coordination of diborylbipyridines and bipyridinediborates
-
6,6'-Bis(diethylboryl)-2,2'-bipyridine (1a) was obtained in low yield by in situ deprotonation of 2,2'-bipyridine in the presence of diethyl(methoxy)borane. 6,6'-Dilithio-2,2'-bipyridine reacts with various alkoxyboranes leading to bipyridinediborates 2 in good yields. The derivatives 2b and 2c allow the formation of the free diborylbipyridines 1b and 1c. The coordination properties of the diboryl-bipyridines as tetra- functional donor-acceptor compounds have been used for the formation of the copper complex 4 and of the adduct 5 which is built from diborylbipyridine and a dihydroxydiboroxan derivative. The composition of the products follows from spectroscopic data and from X-ray structure analyses for 2f, 4, and 5.
- Weis, Norbert,Pritzkow, Hans,Siebert, Walter
-
p. 393 - 398
(2007/10/03)
-
- Hydroboration with haloborane/trialkylsilane mixtures
-
Trialkylsilanes or dialkylsilanes react rapidly with boron trichloride in the absence of ethereal solvents or other nucleophiles to form unsolvated dichloroborane. If no substrate is present, dichloroborane disproportionates to trichloroborane and two geo
- Soundararajan, Raman,Matteson, Donald S.
-
p. 4157 - 4166
(2008/10/09)
-
- A Novel Method for the In Situ Generation of Alkoxydialkylboranes and Their Use in the Selective Preparation of 1,3-Syn Diols
-
An in situ method for generating Et2BOCH3 from triethylborane and methanol without using any other catalysts is described.Using the Et2BOCH3 thus generated as a chelating agent, syn 1,3-diols are prepared in > 98 percent stereochemical purity by reducing β-hydroxy-ketones with sodium borohydride
- Chen, Kau-Ming,Gunderson, Karl G.,Hardtmann, Goetz E.,Prasad, Kapa,Repic, Oljan,Shapiro, Michael J.
-
p. 1923 - 1926
(2007/10/02)
-
- DERIVES MONO ET BICYCLIQUES DU BORE TETRACOORDONNE ET DES α-AMINODIACIDES: REACTIONS AVEC DIVERS NUCLEOPHILES
-
Water, methanol and isopropylamine react mono- and bi-cyclic boroxazolidones (2a and 3a) by attacking the boron atom and not the CO group, with formation of aminodiacid and tricoordinated boron compounds.The boron compounds undergo successive B-C cleavage
- Garrigues, Bernard,Mulliez, Michel
-
-
- Preparation of O-Diorganoboryl Derivatives of Several (Organo)-Phosphorus Acids
-
The O-diorganoboryl derivatives 4-9 of (organo)-phosphorus acids are prepared from diphenylphosphinic acid (1a), dicyclohexylphosphinic acid (1b), phenylphosphinic acid (1c), phenylphosphonic acid (2), and phosphoric acid (3) using activated triethylborane (method A), bis-9-borabicyclononane (method B), or tetraethyldiboroxane (method C).By O-diorganoborylation, 1a-c give the compounds RR'P(O)OB(C2H5)2 , RR'P(O)OBC8H14 , 2 reacts to form C6H5P(O)(OBR2)2 , and 3 yields the compounds OP(OBR2)3 . - The IR and MS data for 4-9, which associate in solution, are discussed.
- Koester, Roland,Synoradzki, Ludwik
-
p. 2850 - 2862
(2007/10/02)
-
- Autoxidation von Trialkylboranen, II. 1H-NMR-Spektroskopische Untersuchungen zum Mechanismus der Redoxreaktion zwischen Trialkylboranen und Dialkyl(alkylperoxy)boranen
-
The intermolecular redox reaction between dimethyl(methylperoxy)borane and 9>trimethylborane, triethylborane, tri-n-propylborane, triisopropylborane, and tri-n-butylborane, as well as between 9>dimethyl(methylperoxy)borane and trimethylborane was investigated directly in an NMR spectrometer.From the CIDNP effects a mechanism of this redox reaction was deduced, which can be considered as generally valid for any reaction between (alkylperoxy)boranes and alkylboranes.According to this mechanism, the alkoxy group of the peroxide is transferred to the boron atom of the alkylborane after homolysis of the O-O bond.The four-coordinate boron compound eliminates instantly an alkyl radical, which forms a radical pair in the singlet state with the boroxyle radical left after the homolysis of the peroxide.
- Huschens, Rainer,Rensch, Rainer,Friebolin, Horst
-
p. 3581 - 3588
(2007/10/02)
-