N-<(2S,3S)-3-hydroxy-2-methyl-3-phenylpropionyl>-(1S,5R,7R)-10,10-dimethyl-3-thioxo-2-aza-4-oxatricyclo<5.2.1.0^1,5>decane | 147168-92-1

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: N-<(2S,3S)-3-hydroxy-2-methyl-3-phenylpropionyl>-(1S,5R,7R)-10,10-dimethyl-3-thioxo-2-aza-4-oxatricyclo<5.2.1.0^1,5>decane
• 英文别名: (2S,3S)-1-[(1S,5R,7R)-10,10-dimethyl-3-sulfanylidene-4-oxa-2-azatricyclo[5.2.1.01,5]decan-2-yl]-3-hydroxy-2-methyl-3-phenylpropan-1-one
• CAS: 147168-92-1
• 化学式: C₂₀H₂₅NO₃S
• 分子量: 359.489
• InChiKey: IVFPIIZWOXPKEE-OAFDLETRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.6
• 重原子数：
  25
• 可旋转键数：
  3
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.6
• 拓扑面积：
  81.9
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  N-<(2S,3S)-3-hydroxy-2-methyl-3-phenylpropionyl>-(1S,5R,7R)-10,10-dimethyl-3-thioxo-2-aza-4-oxatricyclo<5.2.1.0^1,5>decane 在 lithium hydroxide 、 双氧水 作用下， 以 四氢呋喃 、 水 为溶剂， 生成 (-)-(2S,3S)-3-hydroxy-2-methyl-3-phenylpropanoic acid 、 (1S,5R,7R)-10,10-dimethyl-3-thioxo-2-aza-4-oxatricyclo<5.2.1.0^1,5>decane
  参考文献：
  名称：

  Asymmetric aldol reactions: a novel model for switching between chelation- and non-chelation-controlled aldol reactions

  摘要：

  A new camphor-based N-propionyloxazolidinethione provides remarkable levels of asymmetric induction for both chelation-and non-chelation-controlled aldol processes. While the aldol condensation of the derived di-n-butylboryl enolate with various aldehydes affords the 'Evans'' syn aldol with excellent diastereoselectivity, the chlorotitanium enolate gives the ''non-Evans' syn aldol expected from chelation control. Most noteworthy is the observation that the sense of facial selectivity from the chlorotitanium enolate of propionyloxazolidinethione is opposite to that obtained from propionyloxazolidinone. This important finding illustrates the importance of increased chelating potential of the enolate ligand, ring thiocarbonyl, in maximizing the aldol pi-facial discrimination. Final nondestructive chiral auxiliary removal via hydroperoxide-assisted hydrolysis and subsequent esterification provides enantiomerically pure methoxy-carbonyl aldols.

  DOI：

  10.1021/ja00060a010
• 作为产物：
  描述：

  camphor isocyanate 在 sodium tetrahydroborate 、 cerium(III) chloride 、 四氯化钛 、 sodium hydride 、 三乙胺 、 N,N-二异丙基乙胺 作用下， 以 四氢呋喃 为溶剂， 反应 25.08h， 生成 N-<(2S,3S)-3-hydroxy-2-methyl-3-phenylpropionyl>-(1S,5R,7R)-10,10-dimethyl-3-thioxo-2-aza-4-oxatricyclo<5.2.1.0^1,5>decane
  参考文献：
  名称：

  Asymmetric aldol reactions: a novel model for switching between chelation- and non-chelation-controlled aldol reactions

  摘要：

  A new camphor-based N-propionyloxazolidinethione provides remarkable levels of asymmetric induction for both chelation-and non-chelation-controlled aldol processes. While the aldol condensation of the derived di-n-butylboryl enolate with various aldehydes affords the 'Evans'' syn aldol with excellent diastereoselectivity, the chlorotitanium enolate gives the ''non-Evans' syn aldol expected from chelation control. Most noteworthy is the observation that the sense of facial selectivity from the chlorotitanium enolate of propionyloxazolidinethione is opposite to that obtained from propionyloxazolidinone. This important finding illustrates the importance of increased chelating potential of the enolate ligand, ring thiocarbonyl, in maximizing the aldol pi-facial discrimination. Final nondestructive chiral auxiliary removal via hydroperoxide-assisted hydrolysis and subsequent esterification provides enantiomerically pure methoxy-carbonyl aldols.

  DOI：

  10.1021/ja00060a010

文献信息

• “Non-Evans” syn aldol via aldolization of chlorotitanium enolate with TiCl4/aldehyde complex
  作者：Tu-Hsin Yan、Hui-Chun Lee、Chang-Wei Tan

  DOI：10.1016/s0040-4039(00)73635-5

  日期：1993.5

  Direct aldolizations of chlorotitanium enolate derived from camphor-based oxazolidinethione with 1:1 TiCl4-aldehyde complex give ''non-Evans'' syn aldol with excellent diastereoselectivity.