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| Section2 = | Section3 = | Section8 = }} Trimethyl borate is the organoboron compound with the formula B(OCH3)3. It is a colourless liquid that burns with a green flame.〔Robert J. Brotherton, C. Joseph Weber, Clarence R. Guibert, John L. Little "Boron Compounds" in Ullmann's Encyclopedia of Industrial Chemistry 2000, Wiley-VCH. 〕 It is an intermediate in the preparation of sodium borohydride and is a popular reagent in organic chemistry. Borate esters are prepared by heating boric acid or related boron oxides with alcohols under conditions where water is removed.〔 ==Applications== Trimethyl borate is the main precursor to sodium borohydride by its reaction with sodium hydride: :4 NaH + B(OCH3)3 → NaBH4 + 3 NaOCH3 It is a gaseous anti-oxidant in brazing and solder flux. Otherwise, trimethyl borate has no announced commercial applications. It has been explored as a fire retardant, as well as being examined as an additive to some polymers.〔 It is a useful reagent in organic synthesis, as a precursor to boronic acids, which are used in Suzuki couplings. These boronic acids are prepared via reaction of the trimethyl borate with Grignard reagents followed by hydrolysis:. : ArMgBr + B(OCH3)3 → MgBrOCH3 + ArB(OCH3)2 :ArB(OCH3)2 + 2 H2O → ArB(OH)2 + 2 HOCH3 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「trimethyl borate」の詳細全文を読む スポンサード リンク
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