5-methylhexahydro-3H-oxazolo[3,4-a]pyridin-3(5H)-one | 177473-30-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑烷类
• 英文名称: 5-methylhexahydro-3H-oxazolo[3,4-a]pyridin-3(5H)-one
• 英文别名: (5R,8aR)-5-methyl-1,5,6,7,8,8a-hexahydro-[1,3]oxazolo[3,4-a]pyridin-3-one
• CAS: 177473-30-2
• 化学式: C₈H₁₃NO₂
• 分子量: 155.197
• InChiKey: INUXGLALJCNZJV-RNFRBKRXSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.2
• 重原子数：
  11
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.88
• 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：

  5-methylhexahydro-3H-oxazolo[3,4-a]pyridin-3(5H)-one 在 氢氧化钾 、 草酰氯 、 二甲基亚砜 、 N,N-二异丙基乙胺 作用下， 以 二氯甲烷 为溶剂， 反应 44.0h， 生成 (2R,6R)-1-benzyl-6-methylpiperidine-2-carbaldehyde
  参考文献：
  名称：

  Enzymatic Route to Chiral, Nonracemic cis-2,6- and cis,cis-2,4,6-Substituted Piperidines. Synthesis of (+)-Dihydropinidine and Dendrobate Alkaloid (+)-241D

  摘要：

  Piperidine-based compounds are an important class of natural alkaloids found in plants, insects, and amphibians. A general asymmetric synthesis of 2-alkyl-6-methylpiperidines is presented via the enzymatic desymmetrization of meso cis-2,6- and cis,cis-2,4,6-substituted piperidines with Aspergillus niger lipase(ANL). The enzymatic reaction proceeds in excellent chemical yield and high enantiotopic selectivity (ee greater than or equal to 98%). The general method is used to effect the synthesis of (+)-dihydropinidine-HCl as well as the first asymmetric synthesis of dendrobate alkaloid (+)-241D.

  DOI：

  10.1021/jo9519569
• 作为产物：
  描述：

  (2R,4S,6S)-2,6-Bis-hydroxymethyl-4-methoxymethoxy-piperidine-1-carboxylic acid benzyl ester 在 吡啶 、 盐酸 、 4-二甲氨基吡啶 、 sodium hydroxide 、 sodium tetrahydroborate 、 potassium dihydrogenphosphate 、 三乙胺 、 N,N-二异丙基乙胺 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 、 水 、 二甲基亚砜 、 乙腈 为溶剂， 反应 134.5h， 生成 5-methylhexahydro-3H-oxazolo[3,4-a]pyridin-3(5H)-one
  参考文献：
  名称：

  Enzymatic Route to Chiral, Nonracemic cis-2,6- and cis,cis-2,4,6-Substituted Piperidines. Synthesis of (+)-Dihydropinidine and Dendrobate Alkaloid (+)-241D

  摘要：

  Piperidine-based compounds are an important class of natural alkaloids found in plants, insects, and amphibians. A general asymmetric synthesis of 2-alkyl-6-methylpiperidines is presented via the enzymatic desymmetrization of meso cis-2,6- and cis,cis-2,4,6-substituted piperidines with Aspergillus niger lipase(ANL). The enzymatic reaction proceeds in excellent chemical yield and high enantiotopic selectivity (ee greater than or equal to 98%). The general method is used to effect the synthesis of (+)-dihydropinidine-HCl as well as the first asymmetric synthesis of dendrobate alkaloid (+)-241D.

  DOI：

  10.1021/jo9519569

文献信息

• Iridium-Catalyzed, β-Selective C(sp³)–H Silylation of Aliphatic Amines To Form Silapyrrolidines and 1,2-Amino Alcohols
  作者：Bo Su、Taegyo Lee、John F. Hartwig

  DOI：10.1021/jacs.8b10428

  日期：2018.12.26

  reagents and catalysts. The functionalization of C-H bonds β to the nitrogen of aliphatic amines to form prevalent 1,2-amino functionalized structures is particularly challenging because the C-H bond β to nitrogen is stronger than the C-H bond α to nitrogen, and the nitrogen in the amine or its derivatives usually directs a catalyst to react at more distal γ- and δ-C-H bonds to form 5- or 6-membered metallacyclic

  由过渡金属配合物催化的脂肪胺的未活化 C(sp3)-H 键的功能化很重要，因为基于胺的功能存在于大多数生物活性分子和商业药物中。然而，由于烷基胺的碱性和还原性质往往会干扰潜在的试剂和催化剂，因此此类反应一般不发达且难以实现。CH 将 β 键与脂肪胺的氮键官能化以形成普遍的 1,2-氨基官能化结构特别具有挑战性，因为 CH 键 β 与氮键比 CH 键 α 与氮键强，并且胺中的氮或其衍生物通常引导催化剂在更远的 γ-和 δ-CH 键上反应，形成 5 或 6 元金属环中间体。胺中任何位置的 CH 键的对映选择性官能化也令人烦恼，目前仅限于特定的、空间位阻的环状结构的反应。我们报告了铱催化的、未活化的脂肪胺 C(sp3)-H 键的 β-选择性甲硅烷基化形成硅吡咯烷，它们既是常见饱和氮杂环的含硅类似物，也是 Tamao-Fleming 的 1,2-氨基醇的前体氧化。这些胺的甲硅烷基化是通过在杂原子和
• Enzymatic Route to Chiral, Nonracemic <i>cis</i>-2,6- and <i>cis</i>,<i>cis</i>-2,4,6-Substituted Piperidines. Synthesis of (+)-Dihydropinidine and Dendrobate Alkaloid (+)-241D
  作者：Robert Chênevert、Michael Dickman

  DOI：10.1021/jo9519569

  日期：1996.1.1

  Piperidine-based compounds are an important class of natural alkaloids found in plants, insects, and amphibians. A general asymmetric synthesis of 2-alkyl-6-methylpiperidines is presented via the enzymatic desymmetrization of meso cis-2,6- and cis,cis-2,4,6-substituted piperidines with Aspergillus niger lipase(ANL). The enzymatic reaction proceeds in excellent chemical yield and high enantiotopic selectivity (ee greater than or equal to 98%). The general method is used to effect the synthesis of (+)-dihydropinidine-HCl as well as the first asymmetric synthesis of dendrobate alkaloid (+)-241D.