cinnamyl magnesium bromide | 16323-20-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: cinnamyl magnesium bromide
• 英文别名: cinnamylmagnesium bromide
• CAS: 16323-20-9
• 化学式: C₉H₉BrMg
• 分子量: 221.379
• InChiKey: KDIYXORFFQQQTN-UHFFFAOYSA-M

计算性质

• 辛醇/水分配系数(LogP)：
  3.13
• 重原子数：
  11.0
• 可旋转键数：
  3.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.11
• 拓扑面积：
  0.0
• 氢给体数：
  0.0
• 氢受体数：
  0.0

反应信息

• 作为反应物：
  描述：

  cinnamyl magnesium bromide 在 potassium carbonate 、 silver(l) oxide 作用下， 以 四氢呋喃 、 乙腈 为溶剂， 生成 4-(1-Phenyl-2-propenyl)-2,3,4-trimethoxy-2-cyclobuten-1-one
  参考文献：
  名称：

  Synthesis of the bicyclo[3.2.0] ring systems from 4-allylcyclobutenones. Intramolecular ketene/alkene cycloadditions

  摘要：

  A general synthesis of bicyclo[3.2.0]heptenones from 4-allylcyclobutenones is described. The rearrangement is envisaged to involve an electrocyclic ring opening of the cyclobutenone and subsequent intramolecular 2 + 2 cycloaddition of the resulting vinylketene to the nonconjugated allylic alkene moiety. This method is particularly suitable for the synthesis of highly substituted derivatives since the regiochemistry of the substitution pattern is conveniently controlled. The scope of the rearrangement and the mechanism are discussed.

  DOI：

  10.1021/jo00021a025

文献信息

• Photochemical 1,3-stannyl rearrangement of allylic stannanes
  作者：Akio Takuwa、Takashi Kanaue、Koichi Yamashita、Yutaka Nishigaichi

  DOI：10.1039/a707609f

  日期：——

  The photochemical 1,3-stannyl rearrangement of allylic stannanes has been investigated. The photorearrangement of (E)-cinnamyl(triphenyl)stannane is not observed in benzene under anaerobic conditions, while the photoinduced 1,3-stannyl migration takes place in the same solvent under aerobic conditions, or in the presence of organic halides or a radical-trapping agent to give a photoequilibrium mixture of the cinnamylstannane and its branched regioisomer, 1-phenylprop-2-enyl(triphenyl)stannane, with the latter predominating. Cinnamyl(trialkyl)stannanes and their homologues also afford the corresponding branched allylstannanes under similar photochemical conditions. These 1,3-stannyl migrations proceed intramolecularly via cinnamyl π-π* excitation in competition with homolytic (cinnamyl)C–Sn bond fission. In contrast, the 1,3-stannyl migration of crotyl- and prenyl-(tributyl)stannanes is not efficient, but their triphenyl or dibutylphenyl derivatives undergo the 1,3-rearrangement via excitation of the phenyl group(s) on the tin atom to give a regioisomeric mixture of the starting linear tin compounds and the branched ones with the former predominating.

  对烯丙基锡烷的光化学1,3-锡重排进行了研究。在无氧条件下，(E)-肉桂基(三苯基)锡烷在苯中未观察到光重排现象，而在有氧条件下或有有机卤化物或自由基捕获剂存在时，在同一溶剂中发生光诱导的1,3-锡迁移，形成肉桂基锡烷及其支链区域异构体、1-苯基丙-2-烯基(三苯基)锡烷的光平衡混合物，后者占主导地位。肉桂基(三烷基)锡烷及其类似物在类似的光化学条件下也得到相应的支链烯丙基锡烷。这些1,3-锡迁移通过肉桂基π-π*激发的分子内过程进行，与均裂的(肉桂基)C–Sn键断裂竞争。相比之下，巴豆基和烯丙基(三丁基)锡烷的1,3-锡迁移效率不高，但其三苯基或二丁基苯基衍生物通过锡原子上的苯基团激发发生1,3-重排，得到起始线性锡化合物和支链锡化合物的区域异构体混合物，前者占主导地位。
• Organotin reagents for the synthesis of π-allyl, π-cyclopentadienyl, π-indenyl, and other related π-enyl carbonyl derivatives of the transition metals
  作者：Edward W. Abel、Stephen Moorhouse

  DOI：10.1039/dt9730001706

  日期：——

  Organotin compounds such as allyltrimethyltin, cyclopentadienyl trimethyltin, indenyltrimethyltin etc., react with a wide variety of metal carbonyl halides and other metal carbonyl compounds to afford the corresponding π-enyl metal carbonyl derivatives. In many cases conditions are very mild and yields are high, thus commending the reactions for extensive synthetic applications. The possible mechanisms

  有机锡化合物，例如烯丙基三甲基锡，环戊二烯基三甲基锡，茚基三甲基锡等，与多种金属羰基卤化物和其他金属羰基化合物反应，得到相应的π-烯基金属羰基衍生物。在许多情况下，条件非常温和且收率很高，因此推荐该反应用于广泛的合成应用。讨论了这些反应的可能机理。
• Suzuki–Miyaura cross-couplings of secondary allylic boronic esters
  作者：Ben W. Glasspoole、Kazem Ghozati、Jonathon W. Moir、Cathleen M. Crudden

  DOI：10.1039/c2cc16076e

  日期：——

  Palladium-catalyzed cross-coupling reactions of secondary allylic boronic esters with iodoarenes were demonstrated under the conditions previously described for the coupling of benzylic substrates. The regioselectivity of the process was largely dictated by the pattern of olefin substitution.

  在先前描述的苄基底物偶联的条件下，展示了二级烯丙基硼酸酯与碘芳烃的钯催化交叉偶联反应。该过程的区域选择性在很大程度上受到了烯烃取代模式的影响。
• Reactions of trans-cinnamyltriethyl- and trans-cinnamyltriphenyltin with tribromoborane, preferential transfer of the cinnamyl group from tin to boron
  作者：Yoshio Tanigawa、Ichiro Moritani、Shinya Nishida

  DOI：10.1016/s0022-328x(00)81576-4

  日期：1971.4
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: Sn: Org.Verb.2, 1.1.2.2.5, page 192 - 206
  作者：

  DOI：——

  日期：——