(S)-4-(1-methylethyl)-3-<(R)-2-methyl-1-oxo-3-phenylpropyl>-5,5-diphenyloxazolidin-2-one | 213887-92-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (S)-4-(1-methylethyl)-3-<(R)-2-methyl-1-oxo-3-phenylpropyl>-5,5-diphenyloxazolidin-2-one
• 英文别名: (2'R,4S)-5,5-Diphenyl-4-isopropyl-3-(1'-oxo-2'-benzylpropyl)-1,3-oxazolidin-2-one；(4S)-3-[(2R)-2-methyl-3-phenylpropanoyl]-5,5-diphenyl-4-propan-2-yl-1,3-oxazolidin-2-one
• CAS: 213887-92-4
• 化学式: C₂₈H₂₉NO₃
• 分子量: 427.543
• InChiKey: VDJVOOTVRQCTOH-BWKNWUBXSA-N

物化性质

• 沸点：
  585.9±50.0 °C(Predicted)
• 密度：
  1.150±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  6.6
• 重原子数：
  32
• 可旋转键数：
  6
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.29
• 拓扑面积：
  46.6
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (S)-4-(1-methylethyl)-3-<(R)-2-methyl-1-oxo-3-phenylpropyl>-5,5-diphenyloxazolidin-2-one 在 lithium hydroxide 、 正丁基锂 、 双氧水 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 1.5h， 生成 (S)-3-acetyl-4-isopropyl-5,5-diphenyloxazolidin-2-one
  参考文献：
  名称：

  A Useful Modification of theEvans Auxiliary: 4-Isopropyl-5,5-diphenyloxazolidin-2-one

  摘要：

  The 4-isopropyl-5,5-diphenyloxazolidinone (1) is readily prepared from (R)- or (S)-valine ester, PhMgBr, and ethyl chlorocarbonate. It has a melting point of ca. 250 degrees, a low solubility in most organic solvents, and a C=O group which is sterically protected from nucleophilic attack. Thus; the soluble N-acyl-oxazolidinones (7-16) can be prepared from 1 with BuLi at temperatures around 0 degrees instead of - 78 degrees (Scheme 3): their Li enolates can be generated with BuLi, rather than with LDA, and deacylation in the final step of the procedure can be achieved with NaOH at ambient temperatures (Scheme 12),with facile recovery of the precipitating auxiliary 1 (filtering, washing, and drying). The following reactions of N-acyl-oxazolidinones from 1 have been investigated: alkylations (Scheme 4), aminomethylations and hydroxymethylations (Scheme 5), aldol additions (Schemes 6 and 7), Michael additions (Schemes 9 and 10), and a (4 + 2) cycloaddition (Scheme II). The well-known features of reactions following the Evans methodology (yield, diastereoselectivity, dependence on conditions, counter ions, additives etc.) prevail in these transformations. Most products, however, have higher melting points and a much more pronounced crystallization tendency than those derived from conventional oxazolidinones, and can thus be purified by recrystallization, avoiding chromatography (Table 1). The disadvantage of 1 having a higher molecular weight (ca. 150 Da) than the non-phenyl-substituted auxiliary is more than compensated by the ease of its application, especially on large scale. A number of crystal structures of oxazolidinones derived from 1 and a TICl4 complex of an oxazolidinone are described and discussed in view of the diastereoselective-reaction mechanisms.

  DOI：

  10.1002/(sici)1522-2675(19981111)81:11<2093::aid-hlca2093>3.0.co;2-x
• 作为产物：
  描述：

  L-缬氨酸甲酯 在 sodium hydroxide 、 正丁基锂 、 三乙胺 、 zinc dibromide 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 、 甲醇 、 乙醚 、 二氯甲烷 为溶剂， 反应 43.0h， 生成 (S)-4-(1-methylethyl)-3-<(R)-2-methyl-1-oxo-3-phenylpropyl>-5,5-diphenyloxazolidin-2-one
  参考文献：
  名称：

  A Useful Modification of theEvans Auxiliary: 4-Isopropyl-5,5-diphenyloxazolidin-2-one

  摘要：

  The 4-isopropyl-5,5-diphenyloxazolidinone (1) is readily prepared from (R)- or (S)-valine ester, PhMgBr, and ethyl chlorocarbonate. It has a melting point of ca. 250 degrees, a low solubility in most organic solvents, and a C=O group which is sterically protected from nucleophilic attack. Thus; the soluble N-acyl-oxazolidinones (7-16) can be prepared from 1 with BuLi at temperatures around 0 degrees instead of - 78 degrees (Scheme 3): their Li enolates can be generated with BuLi, rather than with LDA, and deacylation in the final step of the procedure can be achieved with NaOH at ambient temperatures (Scheme 12),with facile recovery of the precipitating auxiliary 1 (filtering, washing, and drying). The following reactions of N-acyl-oxazolidinones from 1 have been investigated: alkylations (Scheme 4), aminomethylations and hydroxymethylations (Scheme 5), aldol additions (Schemes 6 and 7), Michael additions (Schemes 9 and 10), and a (4 + 2) cycloaddition (Scheme II). The well-known features of reactions following the Evans methodology (yield, diastereoselectivity, dependence on conditions, counter ions, additives etc.) prevail in these transformations. Most products, however, have higher melting points and a much more pronounced crystallization tendency than those derived from conventional oxazolidinones, and can thus be purified by recrystallization, avoiding chromatography (Table 1). The disadvantage of 1 having a higher molecular weight (ca. 150 Da) than the non-phenyl-substituted auxiliary is more than compensated by the ease of its application, especially on large scale. A number of crystal structures of oxazolidinones derived from 1 and a TICl4 complex of an oxazolidinone are described and discussed in view of the diastereoselective-reaction mechanisms.

  DOI：

  10.1002/(sici)1522-2675(19981111)81:11<2093::aid-hlca2093>3.0.co;2-x

文献信息

• Highly effective and recyclable chiral auxiliaries: a study of the synthesis and use of three 4-isopropyl-5,5-diaryloxazolidin-2-ones
  作者：Karen Alexander (née Gillon)、Stuart Cook、Colin L. Gibson、Alan R. Kennedy†

  DOI：10.1039/b102020j

  日期：——

  A series of three 5,5-diaryl substituted oxazolidin-2-ones (diphenyl, dinaphthyl and ditolyl) have been synthesised. Studies on the benzylation of the lithium enolates of N-acyl derivatives reveal that the yields obtained were sensitive to the method of quenching the reaction. This was particularly acute for the 5,5-diphenyl system where effective yields (69%) and high diastereoselectivities (dr 98 ∶ 2)

  已经合成了一系列三个5，5-二芳基取代的恶唑烷-2-酮（二苯基，二萘基和二甲苯基）。对N-酰基衍生物的烯醇锂的苄基化的研究表明，所获得的收率对淬灭反应的方法很敏感。对于5,5-二苯系统来说尤其如此，仅当将反应淬灭到水性缓冲液中时，才能观察到有效收率（69％）和高非对映选择性（dr 98：2）。对N-酰基衍生物的甲基化研究表明， 只有使用烯醇钠才能观察到最有利的结果（58-69％，博士 91：9）。5,5-ditolyl-4-isopropyloxazolidin-2-one被证明在效率和非对映选择性方面更有效（dr  97：3）。随后，烷基化产物的简单碱性水解允许5,5-二芳基取代的恶唑烷-2--2-酮的高回收率和可回收性，而没有任何有害的环内裂解。另外，从碱性水解中以高收率回收了酰基部分，而没有任何外消旋化的迹象。
• A study of 4-substituted 5,5-diaryl oxazolidin-2-ones as efficacious chiral auxiliaries
  作者：Colin L. Gibson、Karen Gillon、Stuart Cook

  DOI：10.1016/s0040-4039(98)01412-9

  日期：1998.9

  A series of three 5,5-diaryl substituted oxazolidin-2-ones (diphenyl, dinaphthyl and ditolyl) have been prepared and shown to be particularly effective chiral auxiliaries to afford high yields and diastereoselectivities for alkylation and azidations of their N-acyl derivatives. The 5,5-ditolyl oxazolidin-2-one proved to be particularly efficacious in terms of diastereoselectivity, yield and solubility

  已经制备了一系列的三个5，5-二芳基取代的恶唑烷-2-酮（二苯基，二萘基和二甲苯基），并且显示出是特别有效的手性助剂，以为其烷基化和叠氮化其N-酰基衍生物提供高收率和非对映选择性。在非对映选择性，产率和溶解度方面，证明5，5-二甲苯基恶唑烷-2-酮是特别有效的。