(2R,3S,6S,8aR)-3,8a-dimethyl-2-phenylspiro[2,3,7,8-tetrahydro-[1,3]oxazolo[3,2-a]pyridine-6,4'-cycloheptene]-5-one | 361434-11-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 氮杂螺癸烷衍生物
• 英文名称: (2R,3S,6S,8aR)-3,8a-dimethyl-2-phenylspiro[2,3,7,8-tetrahydro-[1,3]oxazolo[3,2-a]pyridine-6,4'-cycloheptene]-5-one
• CAS: 361434-11-9
• 化学式: C₂₁H₂₇NO₂
• 分子量: 325.451
• InChiKey: BVSBVLRNFRBQFJ-YRLHULLVSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  24
• 可旋转键数：
  1
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  29.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (2R,3S,6S,8aR)-3,8a-dimethyl-2-phenylspiro[2,3,7,8-tetrahydro-[1,3]oxazolo[3,2-a]pyridine-6,4'-cycloheptene]-5-one 在 红铝 、 四丁基磷酸氢铵 作用下， 以 四氢呋喃 、 乙醇 为溶剂， 反应 31.0h， 以81%的产率得到(S)-Spiro[5.6]dodeca-1,8-dien-3-one
  参考文献：
  名称：

  An Asymmetric Approach to Spirocylic Systems:  A Formal Synthesis of Zizaene

  摘要：

  A general route to enantiopure spirocarbocycles is described. The use of various chiral bicyclic lactams 1 that have been doubly alkylated with olefinic halides gives good yields of alpha,alpha -disubstituted chiral lactams 2 which were cyclized to spiro-olefins using ring closure metathesis methodology (Grubbs' catalyst). These spirolactams 3, formed in generally excellent yields, were shown to be smoothly transformed into spirocyclopentenone 6, spirocyclohexenone, 7, and spirolactams 8. Further demonstration of this spirocyclization methodology was featured in a formal synthesis of zizaene, by preparing in enantiomeric form the Coates' intermediate 21. This synthetic effort provided additional examples of the synthetic versatility of chiral bicyclic lactams 2a,b.

  DOI：

  10.1021/jo010439p
• 作为产物：
  描述：

  (2R,3S,6S,8aR)-3,8a-dimethyl-6-pent-4-enyl-2-phenyl-6-prop-2-enyl-2,3,7,8-tetrahydro-[1,3]oxazolo[3,2-a]pyridin-5-one 在 dichlorobis(tricyclohexylphosphine)(benzylidene)rhodium 作用下， 以 二氯甲烷 为溶剂， 以82%的产率得到(2R,3S,6S,8aR)-3,8a-dimethyl-2-phenylspiro[2,3,7,8-tetrahydro-[1,3]oxazolo[3,2-a]pyridine-6,4'-cycloheptene]-5-one
  参考文献：
  名称：

  An Asymmetric Approach to Spirocylic Systems:  A Formal Synthesis of Zizaene

  摘要：

  A general route to enantiopure spirocarbocycles is described. The use of various chiral bicyclic lactams 1 that have been doubly alkylated with olefinic halides gives good yields of alpha,alpha -disubstituted chiral lactams 2 which were cyclized to spiro-olefins using ring closure metathesis methodology (Grubbs' catalyst). These spirolactams 3, formed in generally excellent yields, were shown to be smoothly transformed into spirocyclopentenone 6, spirocyclohexenone, 7, and spirolactams 8. Further demonstration of this spirocyclization methodology was featured in a formal synthesis of zizaene, by preparing in enantiomeric form the Coates' intermediate 21. This synthetic effort provided additional examples of the synthetic versatility of chiral bicyclic lactams 2a,b.

  DOI：

  10.1021/jo010439p

文献信息

• An Asymmetric Approach to Spirocylic Systems:  A Formal Synthesis of Zizaene
  作者：Robert C. Hughes、Curt A. Dvorak、A. I. Meyers

  DOI：10.1021/jo010439p

  日期：2001.8.1

  A general route to enantiopure spirocarbocycles is described. The use of various chiral bicyclic lactams 1 that have been doubly alkylated with olefinic halides gives good yields of alpha,alpha -disubstituted chiral lactams 2 which were cyclized to spiro-olefins using ring closure metathesis methodology (Grubbs' catalyst). These spirolactams 3, formed in generally excellent yields, were shown to be smoothly transformed into spirocyclopentenone 6, spirocyclohexenone, 7, and spirolactams 8. Further demonstration of this spirocyclization methodology was featured in a formal synthesis of zizaene, by preparing in enantiomeric form the Coates' intermediate 21. This synthetic effort provided additional examples of the synthetic versatility of chiral bicyclic lactams 2a,b.