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4-picoline-dicyanohydroborane | 252669-99-1

中文名称
——
中文别名
——
英文名称
4-picoline-dicyanohydroborane
英文别名
——
4-picoline-dicyanohydroborane化学式
CAS
252669-99-1
化学式
C8H8BN3
mdl
——
分子量
156.983
InChiKey
MDNDEDORBAUCDR-UHFFFAOYSA-N
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

计算性质

  • 辛醇/水分配系数(LogP):
    None
  • 重原子数:
    None
  • 可旋转键数:
    None
  • 环数:
    None
  • sp3杂化的碳原子比例:
    None
  • 拓扑面积:
    None
  • 氢给体数:
    None
  • 氢受体数:
    None

反应信息

  • 作为反应物:
    描述:
    4-picoline-dicyanohydroborane 、 triethyloxonium fluoroborate 在 sodium hydroxide 作用下, 以 二氯甲烷 为溶剂, 以68%的产率得到(4-picoline)-bis(N-ethylcarbamoyl)borane
    参考文献:
    名称:
    第一胺-二羧基硼烷及其双(甲酯)和双(N-乙酰胺)衍生物的合成。
    摘要:
    胺双(N-乙基氨基甲酰基)硼烷[A.BH(CONHEt)(2),3; 在对[胺-双(C-羟基)进行质子化处理后,制备了A =三甲胺(Me(3)N,a),奎尼丁(Q,b),吡啶(py,f),4-甲基吡啶(pic,g)] -N-乙基亚氨酸根)氢硼(2+)]阳离子(2),是通过[胺-双(乙基氮化)氢硼(2+)]四氟硼酸酯(1)水解而形成的。3的许多代表[A =二乙胺(Et(2)NH,c),哌啶(pip,d),吡咯烷(pyrr,e),4-氨基吡啶(4-NH(2)-py,h),4- (二甲基氨基)吡啶(DMAP,i),咪唑(Him,j),1-甲基咪唑(Mim,k)]是通过3a的碱交换反应制备的。3a-e在酸性或碱性水性介质中极其稳定,可能是由于可能的反应中心存在很大的空间位阻。但是,它们被转化为胺-二羧基硼烷[A. BH(COOH)(2),4a-e]在酸性条件下(100-130摄氏度)在酸性介质中。
    DOI:
    10.1021/ic000557f
  • 作为产物:
    描述:
    4-甲基吡啶4-cyanopyridine-dicyanohydroborane乙腈 为溶剂, 以95%的产率得到4-picoline-dicyanohydroborane
    参考文献:
    名称:
    Synthesis of Amine-dicyanohydroboranes, [Amine-bis(ethylnitrilium)hydroboron(2+)] Tetrafluoroborates, and Their Derivatives as Precursors of Amine-dicarboxyboranes
    摘要:
    Numerous amine-dicyanohydroboranes [A.BH(CN)(2), 1, A = quinuclidine (Q, c), trimethylamine (Me3N, d), 4-picoline (Pic, e), 4-(dimethylamino)pyridine (DMAP, f), N,N,N',N'-tetramethylethylenediamine (TMEDA, j), 1.4-diazabicyclo[2.2.2]octane (DABCO, k)] have been prepared by base exchange reactions from 4-cyanopyridine-dicyanohydroborane (4-CN-py.BH(CN)(2), 1a). In analogous experiments with secondary amines [piperidine (g), diethylamine (h), and morpholine (i)] 1a underwent aminodecyanation also, probably via SNAr mechanism, which demonstrates the strong electron-withdrawing effect of the >N.BHX2 moiety toward the substituents on the nitrogen. Amine-dicyanohydroboranes have been transformed into [amine-bis(C-hydroxy-N-ethylimidate)hydroboron(2+)] (3) [amine-N-ethylcarbamoyl(C-hydroxy-N-ethylimido)hydroboron(1+)] (4), [amine-bis(C-methoxy-N-ethylimidate)hydroboron(2+)] (5), [amine-bis(amidinium)hydroboron(2+)] (6), and [amine-bis(triethylamidinium)hydroboron(2+)] (7) cations, precursors of amine-dicarboxyboranes and their derivatives. These transformations were carried out in two steps. First, the otherwise nonreactive cyano groups were activated by ethylation employing Et3OBF4, yielding [amine-bis(ethylnitrilium)hydroboron(2+)] tetrafluoroborates (2), then 3-7 were obtained by nucleophilic addition to 2. The pK(a) values corresponding to the protonation of the N-ethylamide group were found to be extremely high (3.1-3.3), which demonstrates the strong electron-donating effect of >N.BHX2 moiety toward the substituents on the boron.
    DOI:
    10.1021/ic990023i
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