Tetrabutylammonium borohydride 四丁基硼氢化铵

规格: 98%
CAS: 33725-74-5
产品编号: H61041
MDL: MFCD00012035
品牌: INFI

简介

氢化锂, 氢化铝锂,硼氢化钠,三乙基硼氢化锂(Super Hydride)/钠/钾 ,三仲丁基硼氢化锂( L-Selectride)/钠/钾(K-Selectride),Lithium Trisiamylborohydride (LiBSia3H) 60217-34-7, 三叔丁氧基氢化铝锂,77299-63-9 Lithium diisobutyl-tert-butoxyaluminum hydride solution,Diisobutylaluminum hydride, DIBAL,硼烷四氢呋喃,氨基硼烷等,  金属氢化物,作为还原剂和负氢离子的来源,广泛用于无机和有机合成中,以及作为储氢材料应用到日常生产生活中。金属氢化物还原剂,可以还原取代卤代物到烷烃,醛酮环氧亚胺等到醇或胺,羧酸衍生物如酯,腈及其他衍生物到特别是某些烃基取代的金属化合物,具有反应条件温和,副反应少以及产率高的优点,体现出较好的化学选择性和立体 选择性。在复杂的天然产物,药物分子的合成中,较之其他还原法显示出更多的优点。

应用举例

1. 还原卤代物等到相应的烷烃(反应式A,B),并且氘代实验表明,该还原反应经过明确的SN2取代机理(反应式B)。另外,OTs,OMs等取代基也能被还原。

2. 还原环氧到醇,在如下例中,三乙基硼氢化锂比的四氢铝锂的选择性要高很多。


3. 选择性还原醛酮到相应的醇。在α-环己酮的还原中,以很高的选择性的得到顺势的产品(反应式D);并且在醛和酮同时存在的情况下,可以优先还原醛到相应的一级醇(反应式E)。其中,Lithium trisiamylborohydride (LiBSia3H)表现出更好的选择性,以其他取代的环己酮为例,各氢化物还原总结如表一。

4. 选择性的还原羧酸及其衍生物。可以在有其他可被还原的基团存在下,选择性的还原酯基。

5.其他用途。氢化物也可以转移负氢离子到其他的过度金属有机化合物上,形成新的M-H化合物,选择性的脱除甲基。

参考文献

Lithium Triethyllborohydride,Marek Zaidlewicz,Herbert C. Brown, Encyclopedia of Reagents for Organic Synthesis,2001

Krishnamutthy, S. Schubert R.M Brown, H, C, J., Am Chem. Soc 1973, 95, 8486

JACS, 1973

Chemical NameTetrabutylammonium tetrahydroborate
MDL NumberMFCD00012035
PubChem Substance ID87576737
Beilstein Registry Number4212332
EC Number251-658-2
CAS Number33725-74-5
Synonym 1-Butanaminium, N,N,N-tributyl-, tetrahydroborate Tetrabutylammoniumborohydride,97% 四丁基硼氢化铵 N,N,N-三丁基四氢硼酸-1-丁胺 四正丁基硼氢化铵; Tetra-n-butylammonium tetrahydridoborate TETRABUTYLAMMONIUM TETRAHYDROBORATE 1-Butanaminium,N,N,N-tributyl-,tetrahydroborate(1-) Tetra-n-butylammonium borohydride 98% TETRABUTYLAMMONIUM BORHYDRIDE 四丁基氨硼氢化物 TetrabutylAmmoniumBorohydride98+% TETRA-N-BUTYLAMMONIUM TETRAHYDRIDOBORATE 四正丁基四氢硼酸铵 TETRABUTYLAMMONIUM BOROHYDRIDE TETRA-N-BUTYLAMMONIUM BOROHYDRIDE Tetrabutylammonium Borohydride [Reducing Reagent] Tetrabutylammoniumboranate n,n,n-tributyl-1-butanaminiutetrahydroborate(1-) n,n,n-tributyl-1-butanaminiu tetrahydroborate 四正丁基硼氢化铵
Reaxys-RN4212332
Chemical Name Translation四丁基硼氢化铵
InChIKeyGMBOFJFPOCGSOI-UHFFFAOYSA-N
GHS Symbol
WGK Germany3
Precautionary statements
  • P280 Wear protective gloves/protective clothing/eye protection/face protection. 戴防护手套/防护服/眼睛的保护物/面部保护物。
    Hazard statements
    • H314 Causes severe skin burns and eye damage 导致严重的皮肤灼伤和眼睛损伤
    • H261 In contact with water releases flammable gas 与水接触时释放可燃气体。
      Personal Protective Equipment Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges
      Signal word
      Safety Statements
      • S45 In case of accident or if you feel unwell seek medical advice immediately (show the label where possible) 发生事故时或感觉不适时,立即求医(可能时出示标签);
      • S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 眼睛接触后,立即用大量水冲洗并征求医生意见;
      • S36/37/39 Wear suitable protective clothing, gloves and eye/face protection 穿戴适当的防护服、手套和眼睛/面保护;
      • S7/8 Keep container tightly closed and dry 保存在严格密闭容器中,保持干燥;
      • S43 In case of fire use ... (indicate in the space the precise type of fire-fighting equipment. If water increases the risk add -?Never use water) 着火时使用(指明具体的消防器材种类,如果用水增加危险,注明“禁止用水”
        Packing GroupII
        UN Number
        Risk Statements
        • R15 Contact with water liberates extremely flammable gases 遇水会释放出极端易燃的气体
        • R34 Causes burns 会导致灼伤
        • R36/37/38 Irritating to eyes, respiratory system and skin 对眼睛、呼吸系统和皮肤有刺激性
          Storage condition Moisture Sensitive 易吸潮,密封保存 water-free area
          Hazard Codes F,C
          Hazard Class4.3/8
        • β-酮酰胺(β-ketoamides), β-酮酸酯(β-ketoesters)和碳水化合物衍生物的选择性还原剂.
        • {ALF} With reactive halides (e.g. MeI) in DCM, provides a convenient source of diborane: Tetrahedron Lett., 3173 (1972). Hydroboration of alkenes has also been effected by refluxing with the reagent in chloroform: Indian J. Chem., 37B, 1186 (1998).
        • {ALF} See also Benzyl­triethyl­ammonium borohydride, B24952.
        • {ALF} Organic-soluble borohydride. For references to reduction by borohydride, see Sodium borohydride, 35788. Changing the counter ion permits variation in reactivity and selectivity.
        • {ALF} Amides and nitriles are selectively reduced in dichloromethane: Heterocycles, 14, 1437, 1441 (1980); aryl ester, nitro or halo-substituents are unaffected. For the 1,4-reduction of enones, see: Tetrahedron, 37, 1171 (1981). Carboxylic acids can be reduced to alcohols by refluxing in DCM: Synth. Commun., 30, 941 (2000).
        • {ALF} Effective regent for cleavage of TMS ethers: Synth. Commun., 26, 1065 (1996).
        • 33725-74-5 H61041 Tetrabutylammonium borohydride
四丁基硼氢化铵

          化学属性

          Mol. Formula(C4H9)4NBH4
          Mol. Weight257
          Melting Point126-131
          Flash Point140°(284°F)
          TSCAYes
          Density1.422
          Stability易吸潮
          Solubility可溶

          *以上化合物性质及应用等信息仅供参考