(3S,4R)-1-Benzyl-3-((R)-1-methoxy-ethyl)-4-vinyl-azetidin-2-one | 256371-28-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酰胺类
• 英文名称: (3S,4R)-1-Benzyl-3-((R)-1-methoxy-ethyl)-4-vinyl-azetidin-2-one
• 英文别名: (3S,4R)-1-benzyl-4-ethenyl-3-[(1R)-1-methoxyethyl]azetidin-2-one
• CAS: 256371-28-5
• 化学式: C₁₅H₁₉NO₂
• 分子量: 245.321
• InChiKey: DYZNKZCYXRTHRY-MRVWCRGKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.9
• 重原子数：
  18
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.4
• 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：

  一氧化碳 、 (3S,4R)-1-Benzyl-3-((R)-1-methoxy-ethyl)-4-vinyl-azetidin-2-one 在 (2,5-norbornadiene)Rh⁺B^-Ph₄ 、 (S,S)bis(diphenylphosphino)pentane 、 氢气 作用下， 以 苯 为溶剂， 70.0 ℃ 、8.27 MPa 条件下， 反应 24.0h， 生成 (S)-2-[(2R,3S)-1-Benzyl-3-((R)-1-methoxy-ethyl)-4-oxo-azetidin-2-yl]-propionaldehyde 、 (R)-2-[(2R,3S)-1-Benzyl-3-((R)-1-methoxy-ethyl)-4-oxo-azetidin-2-yl]-propionaldehyde 、 3-[(2R,3S)-1-Benzyl-3-((R)-1-methoxy-ethyl)-4-oxo-azetidin-2-yl]-propionaldehyde
  参考文献：
  名称：

  Regio- and Stereoselective Synthesis of Key 1-Methyl Carbapenem Intermediates via Hydroformylation Using a Zwitterionic Rhodium Catalyst

  摘要：

  The asymmetric hydroformylation of a 4-vinyl beta-lactam catalyzed by a rhodium catalyst with a chiral phosphine ligand was investigated. The catalytic system consisting of a zwitterionic rhodium catalyst, (NBD)Rh+(C6H5B-Ph3) 4, and (S,S)-2,4 bis(diphenylphosphino)pentane, (S,S)-BDPP, gave branched aldehydes in high regio- and stereoselectivity. The hydroformylated products are key intermediates in the synthesis of 1-methylcarbapenem antibiotics. Using (3S,4R)-3-[(R)-1-(tert-butyldimethyl-silyloxy)ethyl]-4-vinyl-2-azetidinone (5a) as the reactant afforded aldehydes in a 97:3 branched-to-linear ratio and 91:9 to beta- to alpha-branched isomers. The regio (branched/linear)- and stereoselectivity (beta/alpha) was >99:1 when (3S,4R)-1-N-BOC-3-[(R)-1-methoxyerhyl]-4-vinyl-2-azetidinone was used as the substrate (5q).

  DOI：

  10.1021/ja993080j
• 作为产物：
  描述：

  (3S,4R)-3-[(R)-1-(tert-butyldimethylsilyloxy)ethyl-4-vinyl-2-azetidinone] 在 四丁基氟化铵 、 sodium hydride 作用下， 以 四氢呋喃 为溶剂， 反应 17.0h， 生成 (3S,4R)-1-Benzyl-3-((R)-1-methoxy-ethyl)-4-vinyl-azetidin-2-one
  参考文献：
  名称：

  Regio- and Stereoselective Synthesis of Key 1-Methyl Carbapenem Intermediates via Hydroformylation Using a Zwitterionic Rhodium Catalyst

  摘要：

  The asymmetric hydroformylation of a 4-vinyl beta-lactam catalyzed by a rhodium catalyst with a chiral phosphine ligand was investigated. The catalytic system consisting of a zwitterionic rhodium catalyst, (NBD)Rh+(C6H5B-Ph3) 4, and (S,S)-2,4 bis(diphenylphosphino)pentane, (S,S)-BDPP, gave branched aldehydes in high regio- and stereoselectivity. The hydroformylated products are key intermediates in the synthesis of 1-methylcarbapenem antibiotics. Using (3S,4R)-3-[(R)-1-(tert-butyldimethyl-silyloxy)ethyl]-4-vinyl-2-azetidinone (5a) as the reactant afforded aldehydes in a 97:3 branched-to-linear ratio and 91:9 to beta- to alpha-branched isomers. The regio (branched/linear)- and stereoselectivity (beta/alpha) was >99:1 when (3S,4R)-1-N-BOC-3-[(R)-1-methoxyerhyl]-4-vinyl-2-azetidinone was used as the substrate (5q).

  DOI：

  10.1021/ja993080j