4,4-di-2-propenyl-2-phenyl-2-penten-5-ol | 133130-05-9

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 肉桂醇
• 英文名称: 4,4-di-2-propenyl-2-phenyl-2-penten-5-ol
• CAS: 133130-05-9
• 化学式: C₁₇H₂₂O
• 分子量: 242.361
• InChiKey: LADGSIKWKXUAJK-SQFISAMPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.22
• 重原子数：
  18.0
• 可旋转键数：
  7.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.29
• 拓扑面积：
  20.23
• 氢给体数：
  1.0
• 氢受体数：
  1.0

反应信息

• 作为反应物：
  描述：

  4,4-di-2-propenyl-2-phenyl-2-penten-5-ol 在 偶氮二异丁腈 三正丁基氢锡 、 sodium hydride 、 间氯过氧苯甲酸 作用下， 以 二氯甲烷 、 甲苯 为溶剂， 反应 6.0h， 生成 7,8-dimethyl-8-phenyl-5-(2-propenyl)-3-oxabicyclo<3.3.0>octan-2-one
  参考文献：
  名称：

  Tandem radical cyclization of acyclic homoallylic xanthates: cyclopentannulated .gamma.-thionolactone and .gamma.-lactones

  摘要：

  The first tandem radical cyclization of linear homoallylic xanthates was explored. Homoallylic xanthates prepared from alpha,beta-unsaturated esters were easily cyclized by tin hydride with an radical initiator to give the corresponding thionolactone annulated cyclopentane skeleton in a high yield. The stereochemistry of cyclized products was also discussed. Thionolactones obtained were oxidized chemoselectivity with m-CPBA under neutral condition to afford gamma-lactones in a high yield.

  DOI：

  10.1021/jo00008a048
• 作为产物：
  描述：

  (E)-4-苯基-2-戊烯酸乙酯 在 六甲基磷酰三胺 、 lithium aluminium tetrahydride 、 lithium diisopropyl amide 作用下， 以 乙醚 为溶剂， 反应 1.17h， 生成 4,4-di-2-propenyl-2-phenyl-2-penten-5-ol
  参考文献：
  名称：

  Tandem radical cyclization of acyclic homoallylic xanthates: cyclopentannulated .gamma.-thionolactone and .gamma.-lactones

  摘要：

  The first tandem radical cyclization of linear homoallylic xanthates was explored. Homoallylic xanthates prepared from alpha,beta-unsaturated esters were easily cyclized by tin hydride with an radical initiator to give the corresponding thionolactone annulated cyclopentane skeleton in a high yield. The stereochemistry of cyclized products was also discussed. Thionolactones obtained were oxidized chemoselectivity with m-CPBA under neutral condition to afford gamma-lactones in a high yield.

  DOI：

  10.1021/jo00008a048

文献信息

• Scope of alkoxymethyl radical cyclizations
  作者：Viresh H. Rawal、Surendra P. Singh、Claire Dufour、Christophe Michoud

  DOI：10.1021/jo00079a016

  日期：1993.12

  We have explored different aspects of the cyclization capability of alkoxymethyl radicals and report here a full account of our investigations. The required radicals were generated from (phenylseleno)methyl ethers (e.g., 6), which were prepared from homoallylic or bis-homoallylic alcohols by a two-step process. The alcohols were alkylated with (iodomethyl)tributylstannane. The stannanes were reacted with n-BuLi, and the resulting alpha-alkoxyanions were trapped with diphenyldiselenide to give the (phenylseleno)methyl ethers, which were stable to chromatography. When treated with tributyltin hydride, in the presence of a radical initiator, these precursors undergo a smooth cyclization to substituted tetrahydrofurans and tetrahydropyrans. Formation of the cyclization product was found to be the primary pathway even at relatively high tin hydride concentration. The diastereoselectivity of this cyclization was comparable to that observed in other radical cyclizations. The cis selectivity in cyclization of 6 increased gradually (up to 11:1) as the reaction temperature was lowered. The cyclization can be used for the synthesis of bicyclic and tricyclic compounds and can be incorporated in systems capable of tandem cyclizations.