benzyl 4,4-dimethyl-5-(2-furyl)-5-oxo-pent-2-enoate | 756491-91-5

• 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: benzyl 4,4-dimethyl-5-(2-furyl)-5-oxo-pent-2-enoate
• 英文别名: benzyl (E)-5-(furan-2-yl)-4,4-dimethyl-5-oxopent-2-enoate
• CAS: 756491-91-5
• 化学式: C₁₈H₁₈O₄
• 分子量: 298.339
• InChiKey: KFYREWRHUHUSMW-ZHACJKMWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  22
• 可旋转键数：
  7
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  56.5
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  benzyl 4,4-dimethyl-5-(2-furyl)-5-oxo-pent-2-enoate 在 samarium diiodide 作用下， 以 四氢呋喃 、 叔丁醇 为溶剂， 以83%的产率得到((1R,2S)-2-Furan-2-yl-2-hydroxy-3,3-dimethyl-cyclopropyl)-acetic acid benzyl ester
  参考文献：
  名称：

  SmI2-Mediated 3-exo-trig cyclisation of δ-oxo-α,β-unsaturated esters to cyclopropanols and derivatives

  摘要：

  In the presence of samarium diiodide and a proton source, delta-oxo-gamma,gamma-disubstituted-alpha,beta-unsaturated esters of general formula R-CO-C(R',R')-CH=CH-CO2Bn readily cyclise to trans-cyclopropanol products and/or lactones derived from the cis isomers. For R=aryl, good stereoselectivities (ca 90%) in favor of the alcohols are generally obtained while a mixture of alcohols and lactones is obtained with R=alkyl or H. For R=cyclopropyl, the lactone is exclusively obtained in more than 90% yield. A mechanistic rationalisation of these variations of diastereoselectivity is proposed. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2004.05.074
• 作为产物：
  描述：

  呋喃甲酰氯 生成 benzyl 4,4-dimethyl-5-(2-furyl)-5-oxo-pent-2-enoate
  参考文献：
  名称：

  SmI2-Mediated 3-exo-trig cyclisation of δ-oxo-α,β-unsaturated esters to cyclopropanols and derivatives

  摘要：

  In the presence of samarium diiodide and a proton source, delta-oxo-gamma,gamma-disubstituted-alpha,beta-unsaturated esters of general formula R-CO-C(R',R')-CH=CH-CO2Bn readily cyclise to trans-cyclopropanol products and/or lactones derived from the cis isomers. For R=aryl, good stereoselectivities (ca 90%) in favor of the alcohols are generally obtained while a mixture of alcohols and lactones is obtained with R=alkyl or H. For R=cyclopropyl, the lactone is exclusively obtained in more than 90% yield. A mechanistic rationalisation of these variations of diastereoselectivity is proposed. (C) 2004 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2004.05.074

文献信息

• SmI2-Mediated 3-exo-trig cyclisation of δ-oxo-α,β-unsaturated esters to cyclopropanols and derivatives
  作者：Sophie Bezzenine-Lafollée、Francois Guibé、Hélène Villar、Riadh Zriba

  DOI：10.1016/j.tet.2004.05.074

  日期：2004.8

  In the presence of samarium diiodide and a proton source, delta-oxo-gamma,gamma-disubstituted-alpha,beta-unsaturated esters of general formula R-CO-C(R',R')-CH=CH-CO2Bn readily cyclise to trans-cyclopropanol products and/or lactones derived from the cis isomers. For R=aryl, good stereoselectivities (ca 90%) in favor of the alcohols are generally obtained while a mixture of alcohols and lactones is obtained with R=alkyl or H. For R=cyclopropyl, the lactone is exclusively obtained in more than 90% yield. A mechanistic rationalisation of these variations of diastereoselectivity is proposed. (C) 2004 Elsevier Ltd. All rights reserved.