6-benzyloxy-2,2-dimethylhex-2-ynoic acid methyl ester | 824948-05-2

• 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: 6-benzyloxy-2,2-dimethylhex-2-ynoic acid methyl ester
• 英文别名: 6-benzyloxy-2,2-dimethylhex-3-ynoic acid methyl ester；3-Hexynoic acid, 2,2-dimethyl-6-(phenylmethoxy)-, methyl ester；methyl 2,2-dimethyl-6-phenylmethoxyhex-3-ynoate
• CAS: 824948-05-2
• 化学式: C₁₆H₂₀O₃
• 分子量: 260.333
• InChiKey: LTMFURXIVFXSLB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  19
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  6-benzyloxy-hex-2-ynoic acid methyl ester 、 碘甲烷 在 六甲基磷酰三胺 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 为溶剂， 反应 9.67h， 以65%的产率得到6-benzyloxy-2,2-dimethylhex-2-ynoic acid methyl ester
  参考文献：
  名称：

  Deconjugative Conversion of α-Alkynyl Esters to α,α-Disubstituted β-Alkynyl Esters

  摘要：

  We report the development of a method for the conversion of a variety of conjugated alpha-alkynyl esters to alpha,alpha-disubstituted beta-alkynylesters through the use of strong amide bases. Studies indicate that the second equivalent of base leads to the dianion intermediate. Optimal conditions included the use of 2 equiv of lithium diisopropylamide in THF with HMPA as the cosolvent followed by trapping with a variety of carbon electrophiles. Trapping with bis-electrophiles leads to spiro cycloalkane products.

  DOI：

  10.1021/jo050218+

文献信息

• Studies on the Base-Promoted Conversion of Conjugated Alkynyl Esters to α-Substituted α-Allenyl Esters
  作者：Salvatore D. Lepore、Yuanjun He、Pamela Damisse

  DOI：10.1021/jo0487754

  日期：2004.12.1

  variety of conjugated alkynyl esters to α-substituted conjugated allenyl esters (racemic) through the use of strong amide bases. Substantially improved yields over typical enolate formation conditions were observed with the use of 2 equiv of lithium diisopropylamide. Trapping studies indicate that the second equivalent of base likely leads to the dianion intermediate, which upon addition of methyl iodide

  我们报告了通过使用强酰胺碱将多种共轭炔基酯转化为α-取代的共轭烯丙基酯（外消旋）的有效方法的发展。通过使用2当量的二异丙基氨基锂锂，观察到在典型的烯醇化物形成条件下产率显着提高。诱捕研究表明，第二当量的碱可能会生成二价阴离子中间体，该二价中间体在添加甲基碘，三甲基甲硅烷基氯或三丁基氯化锡时会生成α-取代的共轭烯基和β，γ-炔基共轭酯的混合物。进一步的优化表明，添加剂盐（如LiCl）主要导致烯基化产物，而使用HMPA作​​为助溶剂可得到β，γ-炔基去共轭的烷基化产物。碱的作用，碱的浓度，
• Deconjugative Conversion of α-Alkynyl Esters to α,α-Disubstituted β-Alkynyl Esters
  作者：Salvatore D. Lepore、Yuanjun He

  DOI：10.1021/jo050218+

  日期：2005.5.1

  We report the development of a method for the conversion of a variety of conjugated alpha-alkynyl esters to alpha,alpha-disubstituted beta-alkynylesters through the use of strong amide bases. Studies indicate that the second equivalent of base leads to the dianion intermediate. Optimal conditions included the use of 2 equiv of lithium diisopropylamide in THF with HMPA as the cosolvent followed by trapping with a variety of carbon electrophiles. Trapping with bis-electrophiles leads to spiro cycloalkane products.