(S)-4-(1-methylethyl)-3-(4-methyl-1-oxopentyl)-5,5-diphenyloxazolidin-2-one | 218800-88-5

• 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-(4-methyl-1-oxopentyl)-5,5-diphenyloxazolidin-2-one
• 英文别名: (4S)-3-(4-methylpentanoyl)-5,5-diphenyl-4-propan-2-yl-1,3-oxazolidin-2-one
• CAS: 218800-88-5
• 化学式: C₂₄H₂₉NO₃
• 分子量: 379.499
• InChiKey: XWULQRDHIGFGEH-QFIPXVFZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.7
• 重原子数：
  28
• 可旋转键数：
  6
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.42
• 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-(4-methyl-1-oxopentyl)-5,5-diphenyloxazolidin-2-one 在 镍 氢气 、 四氯化钛 、 N,N-二异丙基乙胺 作用下， 以 乙醇 、 二氯甲烷 、 乙酸乙酯 为溶剂， -75.0~20.0 ℃ 、100.0 kPa 条件下， 反应 23.0h， 生成 (R)-3-isobutylpyrrolidin-2-one
  参考文献：
  名称：

  Enantioselective Preparation of γ ‐Amino Acids and γ ‐Lactams from Nitro Olefins and Carboxylic Acids, with the Valine‐Derived 4‐Isopropyl‐5,5‐diphenyl‐1,3‐oxazolidin‐2‐one as an Auxiliary

  摘要：

  DOI：

  10.1002/(sici)1522-2675(19991215)82:12<2365::aid-hlca2365>3.0.co;2-#
• 作为产物：
  描述：

  L-缬氨酸甲酯 在 sodium hydroxide 、 正丁基锂 、 三乙胺 作用下， 以 四氢呋喃 、 甲醇 、 乙醚 、 二氯甲烷 为溶剂， 反应 18.0h， 生成 (S)-4-(1-methylethyl)-3-(4-methyl-1-oxopentyl)-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

• Preparation and determination of X-ray-crystal and NMR-solution structures of γ2,3,4-peptides
  作者：Dieter Seebach、Meinrad Brenner、Magnus Rueping、Bernd Schweizer、Bernhard Jaun

  DOI：10.1039/b008377l

  日期：——

  (R,R,R)-γ-Amino acids with side chains in the 2-, 3-, and 4-positions, prepared by addition of acyloxazolidinones to a nitroolefin and hydrogenation, have been coupled to γ- tetra-, and γ-hexapeptides which are shown to form (M)-2.614 helices in the crystal state and in MeOH solution.

  (R,R,R)-δ-氨基酸的侧链位于 2-、3-和 4-位，是通过将酰基噁唑烷酮与硝基烯烃加成并氢化而制备的，已被δ-四肽和δ-六肽偶联，这些δ-四肽和δ-六肽在晶体状态和 MeOH 溶液中形成了 (M)-2.614 螺旋。
• γ2-,γ3-, andγ2,3,4-Amino Acids, Coupling toγ-Hexapeptides: CD Spectra, NMR Solution and X-ray Crystal Structures ofγ-Peptides
  作者：Dieter Seebach、Meinrad Brenner、Magnus Rueping、Bernhard Jaun

  DOI：10.1002/1521-3765(20020201)8:3<573::aid-chem573>3.0.co;2-h

  日期：2002.2.1

  There are numerous possible gamma-amino acids with different degrees of substitution and with various constitutions and configurations. Of these the gamma(4)-and the like- and unlike-gamma(2.4)-amino acids have been previously used as building blocks in gamma-peptides. The synthesis of gamma(2)-, gamma(3)-, and gamma(2.3.4) peptides is now described. The corresponding amino acids have been prepared by Michael addition of chiral N-acyl-oxazolidinone enolates to nitro-olefins, with subsequent reduction of the NO2 to NH2 groups. Such additions to E-2-methyl-nitropropene provide (2R,3R,4R)-2-alkyl-3-methyl-4amino-pentanoic acid derivatives (9, 10, 11). Stepwise coupling and fragment coupling lead to gamma-di-, tri-, and hexapeptides (12-23), which were fully characterized. The crystal structures of one of the gamma-amino acids (2,3-dimethyl-4-amino-pentanoic acid .HCl, 9 a), of a gamma(2.3.4)-di- and a gamma(2.3.4)-tetrapeptide (20, 22) are described, and the NMR solution structure in MeOH of a gamma(2.3.4)-hexapeptide (3) has been determined (using TOCSY, COSY, HSQC, HMBC and ROESY measurements and a molecular dynamics simulated-annealing protocol). A linear conformation (sheet-like), a novel (M) helix built of nine-membered hydrogen-bonded rings, and (M) 2.6(14) helices have thus been identified. NMR measurements at different temperatures (298-393 K) and H/D-exchange rates obtained for the y(2.3.4)- -hexapeptide are interpreted as evidence for the stability of the 2.6(14) helix (no "melting") and for its non-cooperative folding mechanism. CD Spectra of the gamma-peptides have been measured in MeOH and CH3CN, indicating that only the protected and unprotected y(2.3.4)-hexapeptide is present as the 2.614 helix in solution. The structures of the gamma(2)- and gamma(3)-hexapeptides (1, 2) could not be determined.
• Enantioselective Preparation of <i>γ</i> ‐Amino Acids and <i>γ</i> ‐Lactams from Nitro Olefins and Carboxylic Acids, with the Valine‐Derived 4‐Isopropyl‐5,5‐diphenyl‐1,3‐oxazolidin‐2‐one as an Auxiliary
  作者：Meinrad Brenner、Dieter Seebach

  DOI：10.1002/(sici)1522-2675(19991215)82:12<2365::aid-hlca2365>3.0.co;2-#

  日期：1999.12.15
• A Useful Modification of theEvans Auxiliary: 4-Isopropyl-5,5-diphenyloxazolidin-2-one
  作者：Tobias Hintermann、Dieter Seebach

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

  日期：1998.11.11

  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.