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4-benzylidene-2-methyl-1-phenylhept-1-en-3-one | 1259926-45-8

中文名称
——
中文别名
——
英文名称
4-benzylidene-2-methyl-1-phenylhept-1-en-3-one
英文别名
——
4-benzylidene-2-methyl-1-phenylhept-1-en-3-one化学式
CAS
1259926-45-8
化学式
C21H22O
mdl
——
分子量
290.405
InChiKey
CSIZLESQHXLAPN-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):
    5.54
  • 重原子数:
    22.0
  • 可旋转键数:
    6.0
  • 环数:
    2.0
  • sp3杂化的碳原子比例:
    0.19
  • 拓扑面积:
    17.07
  • 氢给体数:
    0.0
  • 氢受体数:
    1.0

反应信息

  • 作为反应物:
    描述:
    4-benzylidene-2-methyl-1-phenylhept-1-en-3-onepotassium permanganate 、 iron(III) chloride hexahydrate 作用下, 以 二氯甲烷乙腈 为溶剂, 反应 4.5h, 以66%的产率得到(3S,4S)-3,4-diphenyloctane-2,5-dione
    参考文献:
    名称:
    交叉共轭二烯的1,4-二酮:高锰酸钾-中断的纳扎罗夫反应
    摘要:
    提出了一种通过高锰酸钾中断Nazarov反应以通过Nazarov羟烯丙基中间体的脱羰基裂解产生syn-2,3-二取代的1,4-二酮的方法,据信这是没有先例的。这一过程使顺式取代基在连接酮羰基碳的2-碳桥上立体定位,并形成一个碳-碳键和两个碳-氧键。在此过程中,两个碳-碳键断裂。
    DOI:
    10.1002/anie.201503696
  • 作为产物:
    参考文献:
    名称:
    Intermolecular [3 + 3]-Cycloadditions of Azides with the Nazarov Intermediate
    摘要:
    Tetrasubstituted 1,4-dien-3-ones undergo Nazarov cyclization at low temperature, followed by reaction with organic azides via an apparent [3 + 3]-cycloaddition to give bridged bicyclic triazenes. These products do not appear to be intermediates in the previously described Schmidt-type process to furnish dihydropyridones. The reaction typically occurs with high diastereoselectivity.
    DOI:
    10.1021/ol102651k
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文献信息

  • Experimental and Computational Studies on Interrupted Nazarov Reactions: Exploration of Umpolung Reactivity at the α-Carbon of Cyclopentanones
    作者:Yen-Ku Wu、Christine R. Dunbar、Robert McDonald、Michael J. Ferguson、F. G. West
    DOI:10.1021/ja507638r
    日期:2014.10.22
    oxyallyl intermediate is subjected to carbon-carbon bond formation. A detailed investigation of reaction parameters to explicitly control the course of the "interrupted" Nazarov reactions is described. This methodology allows for facile installation of α-quaternary centers bearing allyl, alkynyl, and heteroaryl groups in an umpolung fashion. In addition, the trapping event of a Nazarov intermediate with furan
    一组密集取代的α-官能化环戊酮可以通过双组分多米诺反应序列产生,该反应序列需要二乙烯基酮的 Nazarov 电环化和通过选择的捕获方式对所得 2-氧化环戊烯基阳离子进行亲核加成。绕过典型的消除终止,纳扎罗夫氧烯丙基物种可以通过环加成(或形式环加成)与碳 π-亲核试剂反应,其中建立桥连双环系统,或亲核捕获,其中氧烯丙基中间体的一个末端碳受到碳 - 碳键形成。描述了对反应参数的详细研究,以明确控制“中断”纳扎罗夫反应的过程。这种方法允许轻松安装带有烯丙基的 α-四元中心,炔基和杂芳基以 umpolung 方式连接。此外,通过 DFT 计算结合实验数据研究了纳扎罗夫中间体与呋喃的捕获事件,为观察到的反应模式和非对映选择性提供了基本原理。
  • Organoaluminum-Mediated Interrupted Nazarov Reaction
    作者:Yonghoon Kwon、Robert McDonald、Frederick G. West
    DOI:10.1002/anie.201303996
    日期:2013.8.12
    InternAl delivery: Organoaluminum reagents activate 1,4‐dien‐3‐ones for Nazarov electrocyclization (see scheme), then transfer a substituent to the resulting cyclopentenyl cation with moderate to complete regioselectivity and diastereoselectivity.
    内部递送:有机铝试剂激活Nazarov电环化反应的1,4-二烯基-3-酮(参见方案),然后将取代基转移到生成的环戊烯基阳离子上,具有中等至完全的区域选择性和非对映选择性。
  • Intercepting the Nazarov Oxyallyl Intermediate with α-Formyl­vinyl Anion Equivalents to Access Formal Morita–Baylis–Hillman Alkylation Products
    作者:F. West、Yen-Ku Wu、Rongrong Lin
    DOI:10.1055/s-0036-1588769
    日期:2017.7
    catalyzed cationic domino reaction involving sequential electrocyclization and polar addition of allenol ethers onto the resulting oxyallyl species is described. The overall sequence allows a highly stereoselective synthesis of densely substituted cyclopentanoid compounds containing α-formylvinyl functionality which is formally equivalent to products of a Morita–Baylis–Hillman alkylation process.
    描述了路易斯酸催化的阳离子多米诺反应,包括顺序电环化和烯丙醇醚极性加成到所得氧烯丙基物种上。整个序列允许高度立体选择性地合成含有α-甲酰基乙烯基官能团的密集取代的环戊烷类化合物,其形式上等同于 Morita-Baylis-Hillman 烷基化过程的产物。
  • Interrupting Nazarov Reaction with Different Trapping Modality: Utilizing Potassium Alkynyltrifluoroborate as a σ-Nucleophile
    作者:Ronny William、Siming Wang、Asadulla Mallick、Xue-Wei Liu
    DOI:10.1021/acs.orglett.6b01606
    日期:2016.9.16
    cation intermediate generated following Nazarov cyclization of dienone has been successfully intercepted with potassium alkynyltrifluoroborates which act as σ-nucleophiles in the presence of BF3·Et2O. This new trapping modality allowed unprecedented introduction of an alkynyl moiety to the cyclopentanone framework by means of an interrupted Nazarov reaction. The α-alkynyl cyclopentanone product can
    Nazarov环化二烯酮后生成的假定的羟烯丙基阳离子中间体已成功被存在BF 3 ·Et 2 O的σ-亲核试剂炔基三硼酸拦截。这种新的捕集方式允许将炔基部分空前引入环戊酮框架通过中断的纳扎罗夫反应。可以将α-炔基环戊酮产物进一步转化为一系列高密度官能化的环状化合物。
  • Interrupting the Nazarov Cyclization with Bromine
    作者:Devon J. Schatz、Yonghoon Kwon、Thomas W. Scully、F. G. West
    DOI:10.1021/acs.joc.6b02350
    日期:2016.12.16
    The generation of dibrominated cyclopentenones via an interrupted Nazarov cyclization is reported. The installation of two bromine atoms occurs at the α and α′ positions of the cyclopentenyl scaffold via successive nucleophilic and electrophilic bromination of the 2-oxidocyclopentenyl cation and its resulting enolate. Notably, the reaction proceeds with good diastereoselectivity, favoring the symmetrical
    据报道,通过中断的纳扎罗夫环化反应生成了二环戊烯酮。两个溴原子的安装通过2-氧化环戊烯基阳离子及其生成的烯醇化物的连续亲核和亲电化作用而在环戊烯基支架的α和α'位置发生。值得注意的是,反应以良好的非对映选择性进行,有利于对称产物。
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