B-Chlorodialkylboranes for the enolboration of 3,3,3-trifluoropropionates
摘要:
The increased acidity of the alpha-protons of 3,3,3-trifluoropropionates was exploited to achieve the enolboration of these esters using dialkylchloroboranes. (C) 2011 Elsevier Ltd. All rights reserved.
Beiträge zur chemie des bors XLVIII. Zur kenntnis von bis(dialkylboryl)aminen
作者:Heinrich Nöth、Heinrich Vahrenkamp
DOI:10.1016/s0022-328x(00)89761-2
日期:1969.3
Diborylamines of the types (R2B)2NH and (R2B)2NR′ (R = CH3, C2H5, C3H7, C4H9;R′ = CH3) are obtained (a) from dialkylhaloboranes and disilazanes, (b) from dialkylhaloboranes and N-metalated aminoboranes, and (c) by aminolysis of dialkyl(mthylthio)boranes. They are thermodynamically unstable with respect to a decomposition into trialkylboranes and borazine derivatives; their decomposition is catalysed
得到(R 2 B)2 NH和(R 2 B)2 NR'(R = CH 3,C 2 H 5,C 3 H 7,C 4 H 9 ; R'= CH 3)类型的二硼胺(a)来自二烷基卤庚烷和二硅氮烷,(b)来自二烷基卤庚烷和N-金属化的氨基硼烷,以及(c)通过二烷基(甲硫基)硼烷的氨解反应)。就分解成三烷基硼烷和硼嗪衍生物而言,它们在热力学上是不稳定的。它们的分解主要是由二烷基卤呋喃酮催化的。
Trifluoromethyl - substituted boranes. Trifluoromethyldibutylborane and trifluoromethylboron difluoride
作者:Theran D. Parsons、James M. Self、Lewis H. Schaad
DOI:10.1021/ja00990a015
日期:1967.7
trifluoromethyl di-nbutylborane and trifluoromethylboron difluoride are reported. Loss of difluorocarbene from the trifluoromethyl group bonded to electron-deficient boron was observed in the presence of catalysts but in vacuo at room temperature the substances were stable for months. Infrared spectra and vapor pressure data for n-butylboron difluoride and di-n-butylboron fluoride are reported. (Author)
Umsetzung von Metall und metalloidverbindungen mit mehrfunktionellen molekülen
作者:Walter Maringgele、Anton Meller
DOI:10.1016/s0022-328x(00)83053-3
日期:1980.4
N-organyl-N-trimethylsilyl-sulfonamides react with halogenodiorganyl-, bis(amino)halogeno- and phenyldimethylamino-chlorborane in quantitative yield to the corresponding sulfonamidoboranes I – XXII, The compounds XXIII – XXVIII, which have the diorganylboryl-grouping in ω-position to the sulfonamidogroup, are obtained by reaction of N-methyl-N.(β-hydroxyethyl)-n-perfluorobutylsulfonamide with halogeno-diorganyl-
Beiträge zur chemie der borazide VII. Darstellung und eigenschaften von diorganylboraziden
作者:P.I Paetzold、P.P Habereder、R Müllbauer
DOI:10.1016/s0022-328x(00)90824-6
日期:1967.1
The preparation and some properties of diorganylboron azides R′RBN3 and of some of their pyridinates R′RBN3·Py are described.
介绍了二有机基硼叠氮化物R'RBN 3及其部分吡啶盐R'RBN 3 ·Py的制备及其一些性质。
Beiträge zur Chemie des bors XXVIII. Über die Einwirkung von Borhalogeniden auf Dibortetrakis(dimethylamid)
作者:H. Nöth、H. Schick、W. Meister
DOI:10.1016/s0022-328x(00)80031-5
日期:1964.3
The exchange of (CH3)2N groups for halogen in the reaction of tetrakis(dimethylamino)diboron with the boron halides BCl3, BBr3, R2BCl and RBBr2 yields (dimethylamino)halodiborons B2[N(CH3)2]4−nXn (n = 1, 2; XCl, Br). Diboron tetrahalides cannot be prepared by this reaction using excess of a boron halide.
在四(二甲基氨基)二硼与卤化硼BCl 3,BBr 3,R 2 BCl和RBBr 2的反应中,将(CH 3)2 N基团交换为卤素,生成(二甲基氨基)卤代硼B 2 [N(CH 3)2 ] 4- n X n(n = 1,2; X = Cl,Br)。通过使用过量的卤化硼的该反应不能制备四卤化二硼化硼。