(3aS,7aS,Z)-7a-methyl-3-(1-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)ethylidene)-2,3,3a,4-tetrahydrobenzofuran-5(7aH)-one | 1448451-14-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并呋喃
• 英文名称: (3aS,7aS,Z)-7a-methyl-3-(1-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)ethylidene)-2,3,3a,4-tetrahydrobenzofuran-5(7aH)-one
• 英文别名: (3Z,3aS,7aS)-7a-methyl-3-[1-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)ethylidene]-3a,4-dihydro-1-benzofuran-5-one
• CAS: 1448451-14-6
• 化学式: C₁₇H₂₅BO₄
• 分子量: 304.194
• InChiKey: KPPDHKSFNCVUGL-WFDCWPTHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.87
• 重原子数：
  22
• 可旋转键数：
  1
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.71
• 拓扑面积：
  44.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (3aS,7aS,Z)-7a-methyl-3-(1-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)ethylidene)-2,3,3a,4-tetrahydrobenzofuran-5(7aH)-one 在 sodium perborate tetrahydrate 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 12.0h， 以94%的产率得到(3R,3aS,7aS)-3-acetyl-7a-methyl-2,3,3a,4-tetrahydrobenzofuran-5(7aH)-one
  参考文献：
  名称：

  Cu-Catalyzed Asymmetric Borylative Cyclization of Cyclohexadienone-Containing 1,6-Enynes

  摘要：

  The first Cu-catalyzed asymmetric borylative cyclization of cyclohexadienone-containing 1,6-enynes is achieved through a tandem process: selective beta-borylation of propargylic ether and subsequent conjugate addition to cyclohexadienone. The reaction proceeds with excellent regioselectivity and enantioselectivity to afford an optically pure cis-hydrobenzofuran framework bearing alkenylboronate and enone substructures. Furthermore, the resulting bicyclic products could be converted to bridged and tricyclic ring structures. This method extends the realm of Cu-catalyzed asymmetric tandem reactions using bis(pinacolato)diboron (B(2)pin(2)).

  DOI：

  10.1021/ja404593c
• 作为产物：
  描述：

  4-(but-2-yn-1-yloxy)-4-methylcyclohexa-2,5-dienone 、 联硼酸频那醇酯 在 copper(l) chloride 、 sodium t-butanolate 、 (3,5-Dioxa-4-phospha-cyclohepta[2,1-a;3,4-a']dinaphthalen-4-yl)-bis-((R)-1-phenyl-ethyl)-amine 、 甲醇 作用下， 以 四氢呋喃 为溶剂， 反应 48.5h， 以70%的产率得到(3aS,7aS,Z)-7a-methyl-3-(1-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)ethylidene)-2,3,3a,4-tetrahydrobenzofuran-5(7aH)-one
  参考文献：
  名称：

  Cu-Catalyzed Asymmetric Borylative Cyclization of Cyclohexadienone-Containing 1,6-Enynes

  摘要：

  The first Cu-catalyzed asymmetric borylative cyclization of cyclohexadienone-containing 1,6-enynes is achieved through a tandem process: selective beta-borylation of propargylic ether and subsequent conjugate addition to cyclohexadienone. The reaction proceeds with excellent regioselectivity and enantioselectivity to afford an optically pure cis-hydrobenzofuran framework bearing alkenylboronate and enone substructures. Furthermore, the resulting bicyclic products could be converted to bridged and tricyclic ring structures. This method extends the realm of Cu-catalyzed asymmetric tandem reactions using bis(pinacolato)diboron (B(2)pin(2)).

  DOI：

  10.1021/ja404593c