5-ethyl-5-phenylfuran-2(5H)-one | 143766-64-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氢呋喃
• 英文名称: 5-ethyl-5-phenylfuran-2(5H)-one
• 英文别名: 5-Ethyl-5-phenylfuran-2-one
• CAS: 143766-64-7
• 化学式: C₁₂H₁₂O₂
• 分子量: 188.226
• InChiKey: LACPCHOYXSFUBZ-UHFFFAOYSA-N

物化性质

• 沸点：
  340.2±31.0 °C(Predicted)
• 密度：
  1.108±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  14
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 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：

  甲基碘化镁 、 5-ethyl-5-phenylfuran-2(5H)-one 以 乙醚 为溶剂， 生成 (Z)-2-Methyl-5-phenylhept-3-en-2,5-diol
  参考文献：
  名称：

  旋光性α，β-不饱和γ-内酯：烯丙基羧酸的立体定向转变

  摘要：

  描述了手性烯丙基羧酸及其酯转化为α，β-不饱和γ-内酯的条件。发现在3a和3b的情况下，内酯化反应是完全立体定向的。已经确定标题和相关化合物的构型和光学纯度。

  DOI：

  10.1016/0040-4020(78)80035-0
• 作为产物：
  描述：

  在 三乙胺 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 20.0h， 生成 5-ethyl-5-phenylfuran-2(5H)-one
  参考文献：
  名称：

  Lithium 3-Lithio-3-tosylalkanoates: .beta.-Acylvinyl Anion Equivalents of .beta.-Lithiated .alpha.,.beta.-Unsaturated Carboxylic Acids

  摘要：

  The dilithiation of beta-tosylated propanoic, 2-methylpropanoic, and butanoic acid 10 with n-butyllithium at -78 degrees C leads to the corresponding lithium 3-lithio-3-tosylalkanoates 11. They react with different electrophilic reagents (deuterium oxide, iodine, trimethylchlorosilane, alkyl halides, and acyl chlorides) to give the corresponding 3-substituted tosylated alkanoic acids 12. When carbonyl compounds are allowed to react with intermediates 11 followed by in situ lactonization with trifluoracetic anhydride and base-promoted elimination alpha,beta-butenolides are obtained. This methodology is applied to the direct synthesis of the rosefuran lactone precursor 14cg, the O-benzyl derivative of (+/-)-umbelactone (14ch), and (+/-)-andirolactone (14ci). The alkylation and acylation reactions of organolithium compounds 11 followed by esterification with hydrogen chloride in methanol and treatment with 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) afford alpha,beta- and/or beta,gamma-unsaturated esters 17 and/or 18 and unsaturated 4-keto esters 19, respectively. The last methodology has been applied to the synthesis of the unsaturated 4-keto ester 19ae precursor of the seco acid of (+/-)-pyrenophorin (22).

  DOI：

  10.1021/jo00090a043

文献信息

• Lithium 3-lithio-3-tosylpropanoate: A useful α-tosylated homoenolate anion
  作者：Pedro Bonete、Carmen Nájera

  DOI：10.1016/0040-4039(92)88101-a

  日期：1992.7

  Lithium 3-lithio-3-tosylpropanoate (7), prepared by dilithiation of 3-tosylpropanoic acid (6) with n-butyllithium at −78°C, reacts with different elctrophiles yielding the expected 3-functionalized tosylated propanoic acids 8. When carbonyl compounds are used as electrophiles the corresponding α,β-butenolides are prepared directly.

  通过在-78°C下将3-甲苯基丙酸（6）与正丁基锂二锂化制备的3-lithio-3-甲苯基丙酸锂（7）与不同的亲电子试剂反应生成预期的3-官能化甲苯磺酸丙酸8。当羰基化合物用作亲电试剂时，可以直接制备相应的α，β-丁烯内酯。
• Convenient synthesis of α,β-unsaturated γ-butyrolactones and γ-butyrolactams via decarboxylative iodination of paraconic acids and β-carboxyl-γ-butyrolactams using 1,3-diiodo-5,5-dimethylhydantoin
  作者：Supasorn Phae-nok、Chutima Kuhakarn、Manat Pohmakotr、Vichai Reutrakul、Darunee Soorukram

  DOI：10.1039/c5ob01574j

  日期：——

  A convenient synthetic approach to α,β-unsaturated γ-butyrolactones and α,β-unsaturated γ-butyrolactams is developed. The reaction proceeds via decarboxylative iodination of paraconic acids and β-carboxyl-γ-butyrolactams, employing 1,3-diiodo-5,5-dimethylhydantoin (DIH) under irradiation, followed by dehydroiodination of β-iodo-γ-butyrolactones and γ-butyrolactams providing good yields of α,β-unsaturated

  开发了一种简便的合成方法，合成α，β-不饱和γ-丁内酯和α，β-不饱和γ-丁内酰胺。该反应通过在辐射下使用1,3-二碘-5,5-二甲基乙内酰脲（DIH）对对苯二甲酸和β-羧基-γ-丁内酰胺进行脱羧碘化，然后对β-碘-γ-丁内酯和γ-进行加氢碘化来进行。丁内酰胺可提供高产率的α，β-不饱和γ-丁内酯和γ-丁内酰胺，它们是有机合成中合成有用的组成部分。
• Synthesis of 2-(5H)-furanones by cyclization of alkyl allene carboxylates in triflic acid
  作者：Oussama Abdelhamid Mammeri、Ilia M. Baranov、Alexandr Yu Ivanov、Irina A. Boyarskaya、Aleksander V. Vasilyev

  DOI：10.1016/j.tet.2023.133649

  日期：2023.10

  (triflic acid, TfOH) at room temperature or 70 °C for 30 min are cyclized to form 2-(5H)-furanones in yields up to 83%. The reaction cationic intermediates, O-monoprotonated [R2(R3)C=C=C(R1)–C(=O+H)OAlk] and O,C-diprotonated [R2(R3)C+–CH=C(R1)–C(=O+H)OAlk] forms of starting allenes, have been studied experimentally by NMR and theoretically by DFT calculations. It has been found that the cyclization proceeds

  烷基丙二烯羧酸盐 [R 2 (R 3 )C=C=C(R 1 )–C(=O)OAlk] 在 Brønsted 超强酸 CF 3 SO 3 H（三氟甲磺酸，TfOH）中，室温或 70 °C 30 min 环化形成 2-(5 H )-呋喃酮，产率高达 83%。反应阳离子中间体，O-单质子化 [R 2 (R 3 )C=C=C(R 1 )–C(=O + H)OAlk] 和 O,C-二质子化 [R 2 (R 3 )C + – CH=C(R 1 )–C(=O + H)Olk] 形式的起始丙二烯，已通过 NMR 进行了实验研究并在理论上通过 DFT 计算。已发现环化通过起始丙二烯的O,C-二质子化形式进行。
• Lithium 3-Lithio-3-tosylalkanoates: .beta.-Acylvinyl Anion Equivalents of .beta.-Lithiated .alpha.,.beta.-Unsaturated Carboxylic Acids
  作者：Pedro Bonete、Carmen Najera

  DOI：10.1021/jo00090a043

  日期：1994.6

  The dilithiation of beta-tosylated propanoic, 2-methylpropanoic, and butanoic acid 10 with n-butyllithium at -78 degrees C leads to the corresponding lithium 3-lithio-3-tosylalkanoates 11. They react with different electrophilic reagents (deuterium oxide, iodine, trimethylchlorosilane, alkyl halides, and acyl chlorides) to give the corresponding 3-substituted tosylated alkanoic acids 12. When carbonyl compounds are allowed to react with intermediates 11 followed by in situ lactonization with trifluoracetic anhydride and base-promoted elimination alpha,beta-butenolides are obtained. This methodology is applied to the direct synthesis of the rosefuran lactone precursor 14cg, the O-benzyl derivative of (+/-)-umbelactone (14ch), and (+/-)-andirolactone (14ci). The alkylation and acylation reactions of organolithium compounds 11 followed by esterification with hydrogen chloride in methanol and treatment with 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) afford alpha,beta- and/or beta,gamma-unsaturated esters 17 and/or 18 and unsaturated 4-keto esters 19, respectively. The last methodology has been applied to the synthesis of the unsaturated 4-keto ester 19ae precursor of the seco acid of (+/-)-pyrenophorin (22).
• Optically active α,β-unsaturated γ-lactones
  作者：S. Musierowicz、A.E. Wróblewski

  DOI：10.1016/0040-4020(78)80035-0

  日期：1978.1

  Conditions of transformation of chiral allene carboxylic acids and their esters into α,β-unsaturated γ-lactones are described. It was found that in the case of 3a and 3b the lactonisation reaction was completely stereospecific. Configuration and optical purity of the title and related compounds have been established.

  描述了手性烯丙基羧酸及其酯转化为α，β-不饱和γ-内酯的条件。发现在3a和3b的情况下，内酯化反应是完全立体定向的。已经确定标题和相关化合物的构型和光学纯度。