3-methylenechroman-4-one | 78115-49-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: 3-methylenechroman-4-one
• 英文别名: 3-Methylenechroman4-one；3-methylidenechromen-4-one
• CAS: 78115-49-8
• 化学式: C₁₀H₈O₂
• 分子量: 160.172
• InChiKey: GPZSMCFSXYVSAL-UHFFFAOYSA-N

物化性质

• 沸点：
  287.2±40.0 °C(Predicted)
• 密度：
  1.18±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.8
• 重原子数：
  12
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.1
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  3-methylenechroman-4-one 在 氢气 、 C₃₃H₃₆IrNOP⁽¹⁺⁾*C₃₂H₁₂BF₂₄^(1-) 作用下， 以 甲苯 为溶剂， 25.0 ℃ 、200.0 kPa 条件下， 以94%的产率得到(R)-3-methylchroman-4-one
  参考文献：
  名称：

  一种手性二氢异黄酮化合物的制备方法及其产物

  摘要：

  本发明公开了一种手性二氢异黄酮化合物的制备方法，采用特定的催化剂，以环外共轭的化合物为底物制备得到了手性二氢异黄酮化合物，该方法简便易行，适于大规模的工业生产，具有推广价值。

  公开号：

  CN111574487B
• 作为产物：
  描述：

  2-allyloxybenzoyl chloride 在 sodium tetrahydroborate 作用下， 以 苯 为溶剂， 反应 0.75h， 生成 3-methylenechroman-4-one
  参考文献：
  名称：

  Photoinduced Free Radical Chemistry of the Acyl Tellurides: Generation, Inter- and Intramolecular Trapping, and ESR Spectroscopic Identification of Acyl Radicals

  摘要：

  Acyl tellurides are prepared in good to excellent yield by the reaction of sodium aryl tellurides with acyl chlorides, or mixed anhydrides, and are found to be moderately air-stable substances. In contrast to previous literature reports, acyl tellurides of aryl and vinyl carboxylic acids are found to be excellent sources of acyl radicals on photolysis with a simple white light source. The acyl radicals so generated may be trapped intermolecularly by dichalcogenides, or by TEMPO in excellent yield. Trapping by N-tert-butyl-alpha-phenyl nitrone produces a stable nitroxide radical which has been characterized by ESR spectroscopy. The very efficient trapping of acyl radicals by acyl tellurides themselves is demonstrated by a crossover experiment. Acyl tellurides are shown to participate in very efficient radical cyclization reactions onto alkenes with the formation of five-, six-, and eight-membered rings. The immediate products of the cyclizations onto alkenes are alpha-[(aryltelluro)methyl] ketones and the chemistry of these relatively unstable species is briefly described. Treatment with hydrogen peroxide affords alpha-methylene ketones in high yield. When elimination of the aryl telluro group is not possible the alpha-[(aryltelluro)methyl] ketones are stable species that may subsequently be employed in further radical chain reactions, for example with tributyltin hydride and methyl acrylate. Cyclization onto alkynes yields alpha-[(aryltelluro)methylene] ketones which are stable species and which take part in substitution reactions with higher order cuprates or with diphenyl diselenide.

  DOI：

  10.1021/ja00099a011

文献信息

• Efficient α-Methylenation of Carbonyl Compounds in Ionic Liquids at Room Temperature
  作者：J. Rodrigues、Juliana Vale、Daniel Zanchetta、Paulo Moran

  DOI：10.1055/s-0028-1087389

  日期：——

  The application of several 1-butyl-3-methylimidazolium (BMIM) salt ionic liquids as solvent in the α-methylenation of carbonyl compounds at room temperature is reported. The ionic liquid [BMIM][NTf2] gave a clean reaction in a short time and good yields of several α-methylene carbonyl compounds. This ionic liquid was reused without affecting the reaction rates or yields over seven runs.

  报道了几种1-丁基-3-甲基咪唑鎓（BMIM）盐离子液体在常温下对羰基化合物进行α-亚甲基化的溶剂应用。离子液体[BMIM][NTf2]在短时间内提供了干净的反应和多种α-亚甲基羰基化合物的高产率。这种离子液体在连续七次使用中重复使用，未影响反应速率或产率。
• Efficient, direct α-methylenation of carbonyls mediated by diisopropylammonium trifluoroacetate
  作者：Alejandro Bugarin、Kyle D. Jones、Brian T. Connell

  DOI：10.1039/b924577d

  日期：——

  A very efficient method for the direct α-methylenation of carbonyl compounds, with yields up to 99%, utilizing paraformaldehyde, diisopropylammonium trifluoroacetate, and catalytic acid or base, is presented.

  介绍了一种直接将羰基化合物进行α-亚甲基化的非常高效的方法，产率高达99%，该方法利用了多聚甲醛、二异丙基胺三氟乙酸盐以及催化量的酸或碱。
• Cp*Rh(III)-Catalyzed Mild Addition of C(sp³)–H Bonds to α,β-Unsaturated Aldehydes and Ketones
  作者：Bingxian Liu、Panjie Hu、Xukai Zhou、Dachang Bai、Junbiao Chang、Xingwei Li

  DOI：10.1021/acs.orglett.7b00690

  日期：2017.4.21

  A Rh(III)-catalyzed addition of benzylic C(sp3)–H bond to α,β-unsaturated ketones/aldehydes has been realized, leading to efficient synthesis of γ-aryl ketones/aldehydes. This atom-economic reaction proceeded under mild and redox-neutral conditions with a broad substrate scope. Besides benzylic C–H, allylic C–H bonds are also applicable when assisted by O-methyl ketoxime directing groups.

  已经实现了Rh（III）催化的苄基C（sp 3）-H键与α，β-不饱和酮/醛的加成反应，从而有效地合成了γ-芳基酮/醛。这种原子经济反应在温和和氧化还原中性条件下进行，具有广泛的底物范围。除苄基CH键外，在O-甲基酮肟导向基团的辅助下，烯丙基CH键也适用。
• Photoredox-catalyzed procedure for carbamoyl radical generation: 3,4-dihydroquinolin-2-one and quinolin-2-one synthesis
  作者：Wade F. Petersen、Richard J. K. Taylor、James R. Donald

  DOI：10.1039/c7ob01274h

  日期：——

  A reductive approach for carbamoyl radical generation from N-hydroxyphthalimido oxamides under photoredox catalysis is outlined. This strategy was applied to the synthesis of 3,4-dihydroquinolin-2-ones via the intermolecular addition/cyclization of carbamoyl radicals with electron deficient olefins in a mild, redox-neutral manner. Under a general set of reaction conditions, diversely substituted 3

  概述了在光氧化还原催化下由N-羟基邻苯二甲酰亚胺基乙酰胺生成氨基甲酰基自由基的还原方法。该策略通过温和的，氧化还原中性的方式通过与缺电子的烯烃的氨基甲酰基基团的分子间加成/环化反应，应用于3,4-二氢喹啉-2-酮的合成。在一般的反应条件下，可以制备包括螺环系统在内的各种取代的3,4-二氢喹啉-2-酮。通过使用氯取代的烯烃，也可以得到芳族喹啉-2-酮。
• Light-Mediated Asymmetric Aliphatic C–H Alkylation with Hydrogen Atom Transfer Catalyst and Chiral Phosphoric Acid
  作者：Zhen-Yao Dai、Zhong-Sheng Nong、Pu-Sheng Wang

  DOI：10.1021/acscatal.0c00610

  日期：2020.4.17

  In the presence of tetrabutylammonium decatungstate and chiral spiro phosphoric acid, a light-mediated asymmetric C–H functionalization of unactivated hydrocarbons with exocyclic enones has been established. A wide range of cycloalkanes, benzylic, and allylic hydrocarbons are tolerated. This protocol proceeds via a hydrogen atom transfer/radical addition/hydrogen abstraction/enantioselective protonation

  在存在四丁基癸酸铵和手性螺磷酸的情况下，已建立了具有光环烯酮的未活化烃的光介导的不对称C–H官能化。可以耐受各种环烷烃，苄基和烯丙基烃。该方案通过氢原子转移/自由基加成/氢提取/对映选择性质子化中继过程进行。