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N-phenacyl-4-cyanopyridinium bromide | 25357-39-5

中文名称
——
中文别名
——
英文名称
N-phenacyl-4-cyanopyridinium bromide
英文别名
4-cyano-1-(2-oxo-2-phenylethyl)pyridin-1-ium bromide;1-phenacylpyridin-1-ium-4-carbonitrile;bromide
N-phenacyl-4-cyanopyridinium bromide化学式
CAS
25357-39-5
化学式
Br*C14H11N2O
mdl
——
分子量
303.158
InChiKey
ZAXWWCOTSWEEGK-UHFFFAOYSA-M
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):
    -1.27
  • 重原子数:
    18
  • 可旋转键数:
    3
  • 环数:
    2.0
  • sp3杂化的碳原子比例:
    0.07
  • 拓扑面积:
    44.7
  • 氢给体数:
    0
  • 氢受体数:
    3

反应信息

  • 作为反应物:
    描述:
    N-phenacyl-4-cyanopyridinium bromide三乙烯二胺 作用下, 以 为溶剂, 生成 N-phenacyl-4-cyanopyridinium ylide
    参考文献:
    名称:
    Deprotonation of N-phenacyl- and N-acetonyl-4-cyanopyridinium halides with 1,4-diazabicyclo[2,2,2]octane
    摘要:
    In N-phenacyl- and N-acetonyl-4-cyanopyridinium halides (1a.Br and 1b.Cl) the N+CH2 hydrogens are replaced by deuterium in D2O or CH3OD solutions, similarly as in beta-diketones, proving a prototropic equilibrium 1 = 2. The rate constants have been measured for deprotonation of 1a-Br and 1b-Cl with 1,4-diazabicyclo[2,2,2]octane (DABCO) in solutions. UV, FTIR, H-1 and C-13 NMR spectra are consistent with the ylide structure of the deprotonated species. N-phenacyl-4-cyanopyridinium ylide (3a) is relatively stable in the solid state and unstable in solutions. The observed parallel changes in AS and the time of disappearance of the ylide absorption band suggest that solvation is responsible for the ylide stability. The UV-Vis spectra of 1a-Br and 1b-Cl with DABCO show solvent dependent isosbestic points, which suggest that-the decomposition reactions of ylides are very probably, uniform. The PM3 and B3LYP calculations were carried out to investigate the structures of the cations, ylides and their complexes with ammonia and DABCO. Ylides are formed by abstraction of hydroxy proton from cool form (2) via complex 8. (C) 2002 Elsevier Science B.V. All-rights reserved.
    DOI:
    10.1016/s0022-2860(02)00394-0
  • 作为产物:
    描述:
    参考文献:
    名称:
    银促进 (4 + 1) 异氰乙酸酯与烷基吡啶盐的环化:1,2-二取代吲哚嗪的不同区域选择性合成
    摘要:
    报道了一种前所未有的银促进的区域选择性 (4 + 1) 异氰乙酸酯与吡啶盐的环化。已建立的协议提供对一系列合成有用的 N-稠合杂环支架的受控、简便和模块化访问,这些支架包含吲哚嗪、吡咯并 [1,2- a ] 喹啉、吡咯并 [2,1- a ] 异喹啉和 1 H -咪唑[4,5 - a ]indolizin-2(3 H )-ones。提出了涉及亲核加成/质子化/消除/环异构化的机制途径。
    DOI:
    10.1021/acs.orglett.1c02754
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文献信息

  • Diversified Transformations of Tetrahydroindolizines to Construct Chiral 3-Arylindolizines and Dicarbofunctionalized 1,5-Diketones
    作者:Dong Zhang、Zhishan Su、Qianwen He、Zhikun Wu、Yuqiao Zhou、Chenjing Pan、Xiaohua Liu、Xiaoming Feng
    DOI:10.1021/jacs.0c07066
    日期:2020.9.16
    four-stereogenic centered tetrahydroindolizine intermediates could be efficiently transferred into axially chirality in 3-arylindolizines and vicinal pyridyl and aryl substituted 1,5-diketones. In addition, densely functionalized cyclopropanes and bridged cyclic compound were also discovered depended on the nature of the pyridinium ylides. Mechanism studies were involved to explain the stereochemistry during the
    以有效方式对具有结构和功能相似性或差异的小分子集合进行对映选择性多样化合成是有吸引力的,但也是一项艰巨的挑战。四氢吲哚嗪的不对称制备和支化转化为构建具有官能团和立体化学多样性的含 N-杂环的支架提供了一种有用的方法。在此,我们报告了通过吡啶鎓叶立德和烯酮之间的初始非对映选择性和对映选择性 [3+2] 环加成,在多样化的顺序转化之后实现的突破。手性 N,N'-二氧化物-土金属配合物能够原位生成具有旋光活性的四氢茚茚,通过强烈的背景反应形成外消旋体。结合有意的顺序转化,包括方便的重基氧化和光活性 aza-Norrish II 重排,四氢茚茚中间体被转化为最终文库,包括 3-芳基茚衍生物和双碳功能化的 1,5-二羰基化合物。更重要的是,四立体中心四氢茚茚中间体的立体化学可以有效地转化为 3-芳基茚和邻位吡啶基和芳基取代的 1,5-二酮的轴向手性。此外,根据吡啶鎓叶立德的性质,还发现了稠密官能化的
  • Ultrasound-promoted regioselective synthesis of chalcogeno-indolizines by a stepwise 1,3-dipolar cycloaddition
    作者:Marcelo M. Vieira、Bianca T. Dalberto、Felipe L. Coelho、Paulo H. Schneider
    DOI:10.1016/j.ultsonch.2020.105228
    日期:2020.11
    moderate to excellent yields from pyridinium salts and chalcogeno-alkynes. The reaction can be carried out under thermal conditions or by sonochemical processes in short reaction times. The stepwise cycloaddition reaction forming chalcogeno-indolizines is regioselective and extends to a broad range of functional groups. Furthermore, novel chalcogeno-alkynes are reported and the first derivatives of
    从吡啶鎓盐和硫属元素炔类化合物以中等到优异的产率合成了一系列新的吲哚类有机硫属元素衍生物。该反应可以在热条件下或通过声化学方法在短的反应时间内进行。形成硫族吲哚并吲哚酮的逐步环加成反应是区域选择性的,并延伸至广泛的官能团。此外,已经报道了新型硫属元素炔烃,并描述了teluro-吲哚利嗪的第一衍生物。还描述了硒功能化对吲哚嗪的光物理性质的影响,其中化合物在360 nm附近的UV-Vis区显示吸收,并在蓝绿色区域发射。荧光量子产率相对较低(ϕ fl计算出的值与硫族元素对其他杂环的影响一致。
  • Kinetics and Mechanism of the Pyridinolysis of Phenacyl Bromides in Acetonitrile
    作者:Han Joong Koh、Kwang Lae Han、Hai Whang Lee、Ikchoon Lee
    DOI:10.1021/jo000411y
    日期:2000.7.1
    studies of the reactions of substituted phenacyl bromides (YC6H4COCH2Br) with pyridines (XC5H4N) are carried out in acetonitrile at 45.0 degrees C. A biphasic Bronsted plot is obtained with a change in slope from a large (betaX approximately equals 0.65-0.80) to a small (betaX approximately 0.36-0.40) value at pKa = 3.2-3.6, which can be attributed to a change in the rate-determining step from breakdown
    在45.0摄氏度下于乙腈中进行了取代的苯甲酰溴(YC6H4COCH2Br)与吡啶(XC5H4N)反应的动力学研究。获得了双相布朗斯台德图,其斜率从大(βX约等于0.65-0.80)变化为pKa = 3.2-3.6时有一个很小的值(betaX大约为0.36-0.40),这可以归因于随着吡啶亲核试剂的碱度增加,从分解到反应路径中四面体中间体形成的速率确定步骤发生变化。吡啶比苯胺具有更快的速率以及交叉相互作用常数rhyXY从大的正(rhoXY = +1.4)到小的正的(rhoXY大约+0.1)值的变化支持了该机制。Hammett rhoX的大小很大(= -5.5至-6。9)具有吸电子取代基的吡啶值和pi受体p-CH3CO和p-CN的正偏差与吡啶离子形成平衡的值非常相似。激活参数也符合所提出的机制。
  • Visible-Light-Induced Carbo-2-pyridylation of Electron-Deficient Alkenes with Pyridinium Salts
    作者:Rong-Bin Hu、Shuai Sun、Yijin Su
    DOI:10.1002/anie.201704385
    日期:2017.8.28
    A simple and practical visible-light-induced carbo-2-pyridylation of electron-deficient alkenes with readily available N-benzoylmethylpyridinium bromides is reported. More than 40 examples are presented and proceed in greater than 80 % yield (on average) with excellent regio- and diastereoselectivities.
    据报道,用容易获得的N-苯甲酰基甲基吡啶鎓溴化物,对缺电子的烯烃进行了简单,实用的可见光诱导的Carbo-2-吡啶基化。提出了40多个实例,并以优异的区域选择性和非对映选择性进行了平均收率超过80%的研究。
  • Stereochemical Study on 1,3-Dipolar Cycloaddition Reactions of Heteroaromatic<i>N</i>-Ylides with Symmetrically Substituted cis and trans Olefins
    作者:Otohiko Tsuge、Shuji Kanemasa、Shigeori Takenaka
    DOI:10.1246/bcsj.58.3137
    日期:1985.11
    Stereochemistry of the cycloadditions of twenty-four heteroaromatic N-ylides with several symmetrically substituted cis and trans olefins has been investigated. Cyclic and acyclic cis olefins cycloadd to the and form of the ylides in a highly endo-selective manner giving almost quantitative yields of stereospecific endo 3+2 cycloadducts. N-Ylides stabilized with a substituent of carbonyl type react
    已经研究了二十四个杂芳族 N-叶立德与几个对称取代的顺式和反式烯烃的环加成的立体化学。环状和无环顺式烯烃以高度内选择性方式环加成到叶立德的 和 形式,产生几乎定量的立体定向内 3+2 环加合物。用羰基型取代基稳定的 N-叶立德与反式烯烃反应,主要形成两个立体异构的 3+2 环加合物,形成叶立德的反形式。在大多数情况下,它们通过逆环加成过程进行立体有择互变,异构体比例和转化的容易程度取决于在环加成步骤中建立的五元环上取代基的性质和大小。另一方面,
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