4,4,5-trimethyl-3-oxacyclopentanone | 102547-92-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氢呋喃
• 英文名称: 4,4,5-trimethyl-3-oxacyclopentanone
• 英文别名: 4,5,5-Trimethyl-dihydro-furan-3-on；2,2,3-Trimethyl-4-oxo-tetrahydrofuran；4,5,5-trimethyloxolan-3-one
• CAS: 102547-92-2
• 化学式: C₇H₁₂O₂
• 分子量: 128.171
• InChiKey: IMGKHNBWOXQHCK-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.0
• 重原子数：
  9.0
• 可旋转键数：
  0.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.86
• 拓扑面积：
  26.3
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为产物：
  描述：

  2-tert-butyl-1,4-dioxaspiro<2.2>pentane 、 对甲苯磺酸 生成 4,4,5-trimethyl-3-oxacyclopentanone
  参考文献：
  名称：

  CRANDALL, JACK K.;BATAL, DAVID J.;SEBESTA, DAVID P.;LIN, FENG, J. ORG. CHEM., 56,(1991) N, C. 1153-1166

  摘要：

  DOI：

文献信息

• 1,4-Dioxaspiro[2.2]pentanes. Synthesis, spectroscopic properties, and reactions with nucleophiles
  作者：Jack K. Crandall、David J. Batal、David P. Sebesta、Feng Lin

  DOI：10.1021/jo00003a044

  日期：1991.2

  A number of simple allenes have been converted cleanly to the corresponding 1,4-dioxaspiro[2.2]pentanes in good yields by oxidation with dimethyldioxirane. Mono- and trisubstituted allenes give the anti diastereomers with good stereoselectivity, whereas 1,3-disubstituted allenes show only a slight preference for the anti,anti isomers, unless steric effects are extreme. Stereochemical assignments are based on steric considerations and a consistent set of NMR characteristics that permit structural attributions. The addition of a range of nucleophiles (water, alcohols, amines, thiophenol, acetate, chloride, and fluoride) to these intermediates proceeded smoothly under buffered conditions to give highly functionalized products of general type 5. These reactions were shown to take place with the appropriate selectivities for S(N)2 substitutions in instances where these features were observable, namely, regioselective attack at the less-substituted epoxide carbon and inversion of configuration at the site of substitution. Under acidic conditions dioxaspiropentanes gave mixtures of other types of products, which appear to arise from carbocationic processes.
• CRANDALL, JACK K.;BATAL, DAVID J.;SEBESTA, DAVID P.;LIN, FENG, J. ORG. CHEM., 56,(1991) N, C. 1153-1166
  作者：CRANDALL, JACK K.、BATAL, DAVID J.、SEBESTA, DAVID P.、LIN, FENG

  DOI：——

  日期：——