翻訳と辞書 Words near each other ・ Boronia imlayensis ・ Boronia keysii ・ Boronia ledifolia ・ Boronia megastigma ・ Boronia mollis ・ Boronia molloyae ・ Boronia muelleri ・ Boronia Park ・ Boronia pinnata ・ Boronia Pre-release Centre for Women ・ Boronia Province ・ Boronia railway station ・ Boronia safrolifera ・ Boronia serrulata ・ Boronia, Victoria ・ Boronic acid ・ Boronice ・ Boronuk ・ Boronów ・ Boroo Gold Mine ・ Boroondara General Cemetery ・ Borophagina ・ Borophaginae ・ Borophagini ・ Borophagus ・ Borophagus diversidens ・ Borophagus dudleyi ・ Borophagus hilli ・ Borophagus littoralis ・ Borophagus orc Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Boronic acid ： ウィキペディア英語版 Boronic acid A boronic acid is an alkyl or aryl substituted boric acid containing a carbon–boron bond belonging to the larger class of organoboranes. Boronic acids act as Lewis acids. Their unique feature is that they are capable of forming reversible covalent complexes with sugars, amino acids, hydroxamic acids, etc. (molecules with vicinal, (1,2) or occasionally (1,3) substituted Lewis base donors (alcohol, amine, carboxylate)). The pKa of a boronic acid is ~9, but they can form tetrahedral boronate complexes with pKa ~7. They are occasionally used in the area of molecular recognition to bind to saccharides for fluorescent detection or selective transport of saccharides across membranes. Boronic acids are used extensively in organic chemistry as chemical building blocks and intermediates predominantly in the Suzuki coupling. A key concept in its chemistry is transmetallation of its organic residue to a transition metal. The compound bortezomib with a boronic acid group is a drug used in chemotherapy. The boron atom in this molecule is a key substructure because through it certain proteasomes are blocked that would otherwise degrade proteins. == Boronic acids == Many air-stable boronic acids are commercially available. They are characterised by high melting points. Since boronic acids easily lose water to form the cyclic trimeric anhydride, commercial material often contains substantial quantities of this anhydride. This does not affect reactivity. 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「Boronic acid」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.