- A process for preparing a diboron ester (by machine translation)
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The invention discloses a process for preparing a diboron ester. Borane complexes and corresponding diol reaction and produce corresponding mellow borane, the iron then took place in the presence of catalyst to self-coupling forming a diboron ester. Short synthesis steps of the method, high safety, mild reaction conditions, suitable for many kinds of a diboron ester synthesis. (by machine translation)
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Paragraph 0016
(2016/12/16)
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- Borylation of organo halides and triflates using tetrakis(dimethylamino) diboron
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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.
- Bello, Charles S.,Schmidt-Leithoff, Joachim
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p. 6230 - 6235,6
(2012/12/11)
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- PREPARATION OF DIBORONIC ESTERS
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This invention relates to a process for the preparation of an ester of diboronic acid comprising reacting a tetrakis(dialkylamino)diboron with an alcohol to form the ester and a volatile dialkylamine, wherein the volatile dialkylamine is liberated from the reaction mixture in gaseous form.
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- Boronic compounds
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This invention relates to a diboron derivative of formula (I) or a diboron derivative of formula (II) or a diboron derivative of formula (III) where R1, R2, R3 and R4 are each independently selected from the group consisting of optionally substituted alkyl, optionally substituted alkenyl, optionally substituted aryl, optionally substituted cycloalkyl, optionally substituted cycloalkenyl, a group of the formula —(R5Q)mR6 where Q is selected from O, S, NR7, optionally substituted arylene and optionally substituted cycloalkylene, m is an integer selected from 1 to 3, the or and each R5 is independently an optionally substituted C1-C3 alkylene, R6 is C1-C3 alkyl or hydrogen, and R7 is hydrogen or C1-C12 alkyl; each X is independently selected from O, S(O)n and NR7, where n is an integer from 0 to 3, R7 is hydrogen or C1-C12 alkyl, or one or more of —NR1R7, —NR2R7, —NR3R7 and —NR4R7 represent an optionally substituted 5 or 6 membered heterocyclyl group,and A, A1 and A2 are divalent groups which may or may not be different.
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