(4R,5S)-5-ethyl-4-phenyltetrahydrofuran-2-one | 147599-26-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酯类
• 英文名称: (4R,5S)-5-ethyl-4-phenyltetrahydrofuran-2-one
• 英文别名: (4R,5S)-5-ethyl-4-phenyloxolan-2-one
• CAS: 147599-26-6
• 化学式: C₁₂H₁₄O₂
• 分子量: 190.242
• InChiKey: UTARBSOFHVYSAF-MNOVXSKESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.5
• 重原子数：
  14
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.42
• 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：

  (4R,5S)-5-ethyl-4-phenyltetrahydrofuran-2-one 在 lithium aluminium tetrahydride 、 dimethyl sulfide borane 、 水 、 三乙胺 、 甘油 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 27.25h， 生成 (S)-3-phenylhexane
  参考文献：
  名称：

  Regio-, stereo-, and enantioselectivity in the electrophilic reactions of 2-amino-4-phenyl-3-butenenitriles

  摘要：

  The allylic anion generated from 2-(N-methylanilino)-4-phenyl-3-butenenitrile (1) reacted with iodomethane and 3-bromo-1-chloropropane in THF/HMPA to give the gamma-substitution products exclusively, predominantly in the 2Z-configuration. Substitution of the N-methylanilino group with the methyl ether of L-(-)-ephedrine resulted in the generation of chiral aminonitrile 2. Lithiated 2 reacted sluggishly in THF with allyl bromide and benzyl chloride in the absence of HMPA to give the gamma-substitution products predominantly in the 2Z-configuration, with little diastereoselectivity. The aminonitrile 3 prepared from cinnamaldehyde, L-(-)-ephedrine, and KCN was lithiated with 2 equiv of LDA resulting in high facial selectivity (76-100% diastereomeric excess) in alkylations in the presence of HMPA and LiI. Lithiated 3 reacted with propionaldehyde, benzaldehyde, and p-bromobenzaldehyde at-78-degrees-C to give the gamma-addition products, predominantly in the 4R-configuration (64-78% de). The stereochemistry of the isomers of each product was determined by chemical correlation and spectral methods including analyses of the CD spectra and X-ray diffraction. A bicyclic transition state C wherein lithium is chelated by both amino and alkoxy groups is proposed to interpret the observed stereoselectivity.

  DOI：

  10.1021/jo00059a027
• 作为产物：
  描述：

  2--4-phenyl-3-butenenitrile 在 草酸 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 为溶剂， 反应 13.0h， 生成 (4R,5S)-5-ethyl-4-phenyltetrahydrofuran-2-one
  参考文献：
  名称：

  Regio-, stereo-, and enantioselectivity in the electrophilic reactions of 2-amino-4-phenyl-3-butenenitriles

  摘要：

  The allylic anion generated from 2-(N-methylanilino)-4-phenyl-3-butenenitrile (1) reacted with iodomethane and 3-bromo-1-chloropropane in THF/HMPA to give the gamma-substitution products exclusively, predominantly in the 2Z-configuration. Substitution of the N-methylanilino group with the methyl ether of L-(-)-ephedrine resulted in the generation of chiral aminonitrile 2. Lithiated 2 reacted sluggishly in THF with allyl bromide and benzyl chloride in the absence of HMPA to give the gamma-substitution products predominantly in the 2Z-configuration, with little diastereoselectivity. The aminonitrile 3 prepared from cinnamaldehyde, L-(-)-ephedrine, and KCN was lithiated with 2 equiv of LDA resulting in high facial selectivity (76-100% diastereomeric excess) in alkylations in the presence of HMPA and LiI. Lithiated 3 reacted with propionaldehyde, benzaldehyde, and p-bromobenzaldehyde at-78-degrees-C to give the gamma-addition products, predominantly in the 4R-configuration (64-78% de). The stereochemistry of the isomers of each product was determined by chemical correlation and spectral methods including analyses of the CD spectra and X-ray diffraction. A bicyclic transition state C wherein lithium is chelated by both amino and alkoxy groups is proposed to interpret the observed stereoselectivity.

  DOI：

  10.1021/jo00059a027

文献信息

• Chang Chih-Jung, Fang Jim-Min, Liao Li-Fan, J. Org. Chem., 58 (1993) N 7, S 1754-1761
  作者：Chang Chih-Jung, Fang Jim-Min, Liao Li-Fan

  DOI：——

  日期：——
• Regio-, stereo-, and enantioselectivity in the electrophilic reactions of 2-amino-4-phenyl-3-butenenitriles
  作者：Chih Jung Chang、Jim Min Fang、Li Fan Liao

  DOI：10.1021/jo00059a027

  日期：1993.3

  The allylic anion generated from 2-(N-methylanilino)-4-phenyl-3-butenenitrile (1) reacted with iodomethane and 3-bromo-1-chloropropane in THF/HMPA to give the gamma-substitution products exclusively, predominantly in the 2Z-configuration. Substitution of the N-methylanilino group with the methyl ether of L-(-)-ephedrine resulted in the generation of chiral aminonitrile 2. Lithiated 2 reacted sluggishly in THF with allyl bromide and benzyl chloride in the absence of HMPA to give the gamma-substitution products predominantly in the 2Z-configuration, with little diastereoselectivity. The aminonitrile 3 prepared from cinnamaldehyde, L-(-)-ephedrine, and KCN was lithiated with 2 equiv of LDA resulting in high facial selectivity (76-100% diastereomeric excess) in alkylations in the presence of HMPA and LiI. Lithiated 3 reacted with propionaldehyde, benzaldehyde, and p-bromobenzaldehyde at-78-degrees-C to give the gamma-addition products, predominantly in the 4R-configuration (64-78% de). The stereochemistry of the isomers of each product was determined by chemical correlation and spectral methods including analyses of the CD spectra and X-ray diffraction. A bicyclic transition state C wherein lithium is chelated by both amino and alkoxy groups is proposed to interpret the observed stereoselectivity.