(+/-)-tert-butyl N-hydroxy(1-phenylbut-3-enyl)carbamate | 1132792-94-9

• 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: (+/-)-tert-butyl N-hydroxy(1-phenylbut-3-enyl)carbamate
• CAS: 1132792-94-9
• 化学式: C₁₅H₂₁NO₃
• 分子量: 263.337
• InChiKey: GMMSLXDMCHLXBK-UHFFFAOYSA-N

物化性质

• 沸点：
  366.2±52.0 °C(predicted)
• 密度：
  1.088±0.06 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

反应信息

• 作为反应物：
  描述：

  溴苯 、 (+/-)-tert-butyl N-hydroxy(1-phenylbut-3-enyl)carbamate 在 tris(dibenzylideneacetone)dipalladium (0) 、 4,5-双二苯基膦-9,9-二甲基氧杂蒽 、 sodium t-butanolate 作用下， 以 甲苯 为溶剂， 生成 (+/-)-(3R*,5S*)-tert-butyl 5-(naphthalen-2-ylmethyl)-3-phenylisoxazolidine-2-carboxylate 、 (+/-)-(3R*,5R*)-tert-butyl 5-(naphthalen-2-ylmethyl)-3-phenylisoxazolidine-2-carboxylate
  参考文献：
  名称：

  Influence of Hydroxylamine Conformation on Stereocontrol in Pd-Catalyzed Isoxazolidine-Forming Reactions

  摘要：

  Palladium-catalyzed carboamination reactions between N-Boc-O-(but-3-enyl)hydroxylamine derivatives and aryl or alkenyl bromides afford cis-3,5- and trans-4,5-disubstituted isoxazolidines in good yield with up to >20:1 dr. The diastercoselectivity observed in the formation of cis-3,5-disubstituted isoxazolidines is superior to selectivities typically obtained in other transformations, such as 1,3-dipolar cycloaddition reactions, that provide these products. In addition, the stereocontrol in the C-N bond-forming Pd-catalyzed carboamination reactions of N-Boc-O-(but-3-enyl)hydroxylamines is significantly higher than that of related C-O bond-forming carboetherification reactions of N-benzyl-N-(but-3-enyl)hydroxylamine derivatives. This is likely due to a stereoelectronic preference for cyclization via transition states in which the Boc group is placed in a perpendicular orientation relative to the plane of the developing ring, which derives from the conformational equilibria of substituted hydroxylamines.

  DOI：

  10.1021/jo8027399
• 作为产物：
  描述：

  在 sodium hydroxide 、 水 作用下， 以 甲醇 为溶剂， 以0.83 g的产率得到(+/-)-tert-butyl N-hydroxy(1-phenylbut-3-enyl)carbamate
  参考文献：
  名称：

  Influence of Hydroxylamine Conformation on Stereocontrol in Pd-Catalyzed Isoxazolidine-Forming Reactions

  摘要：

  Palladium-catalyzed carboamination reactions between N-Boc-O-(but-3-enyl)hydroxylamine derivatives and aryl or alkenyl bromides afford cis-3,5- and trans-4,5-disubstituted isoxazolidines in good yield with up to >20:1 dr. The diastercoselectivity observed in the formation of cis-3,5-disubstituted isoxazolidines is superior to selectivities typically obtained in other transformations, such as 1,3-dipolar cycloaddition reactions, that provide these products. In addition, the stereocontrol in the C-N bond-forming Pd-catalyzed carboamination reactions of N-Boc-O-(but-3-enyl)hydroxylamines is significantly higher than that of related C-O bond-forming carboetherification reactions of N-benzyl-N-(but-3-enyl)hydroxylamine derivatives. This is likely due to a stereoelectronic preference for cyclization via transition states in which the Boc group is placed in a perpendicular orientation relative to the plane of the developing ring, which derives from the conformational equilibria of substituted hydroxylamines.

  DOI：

  10.1021/jo8027399