(R)-3-(tert-butyldiphenylsilyloxymethyl)morpholine | 885321-34-6

• 分子结构分类: 有机化合物 - 有机金属化合物 - 有机类金属化合物
• 英文名称: (R)-3-(tert-butyldiphenylsilyloxymethyl)morpholine
• 英文别名: tert-butyl-[[(3R)-morpholin-3-yl]methoxy]-diphenylsilane
• CAS: 885321-34-6
• 化学式: C₂₁H₂₉NO₂Si
• 分子量: 355.552
• InChiKey: GESSHGMCOWEYIN-GOSISDBHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.55
• 重原子数：
  25
• 可旋转键数：
  6
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  30.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (R)-3-(tert-butyldiphenylsilyloxymethyl)morpholine 在 四丁基氟化铵 作用下， 以 四氢呋喃 为溶剂， 以87%的产率得到3(S)-羟基甲基吗啉
  参考文献：
  名称：

  Synthesis of chiral C/N-functionalized morpholine alcohols: study of their catalytic ability as ligand in asymmetric diethylzinc addition to aldehyde

  摘要：

  A broad variety of chiral C/N-functionalized morpholine alcohols sharing a common structural motif in the 3-(hydroxy-methyl)morpholine 6 were prepared froin criantiomerically pure serine for the purpose of studying their catalytic ligand properties. The asymmetric addition of diethylzinc to benzaldehyde in the presence of 10 mol % of chiral C/N-functionalized morpholine alcohols gave 1-phenyl-1-propanol in 59-81% yield with 10-30% ee. The addition of 10 mol % of n-butyl lithium to the reaction mixture resulted in a significant enhancement of the stereoselectivity in the case of ligands bearing the two geminal phenyl substituents on the backbone. In the presence of n-butyl lithium and using (S)-3-(hydroxydiphcnylmethyl)morpholine (S)-19 as the chiral promoter, (S)-1-phenyl-1 -propanol was obtained in 81% yield with 76% ee. The geminal diphenyl-class of morpholine ligands was examined for the diethylzinc addition to four different aldehydes in the presence of n-butyl lithium. (S)-N-Benzyl-3-(hydroxydiphenymethyl)morpholine (S)-27 was found to be most enantioselective in the case of 4-metlioxybenzaldehyde to give (R)-alcohol in 87K yield with 80% ee. Catalysts (S)-19 and its N-methyl derivative (S)-26 gave alcohols with an (S)-absolute configuration while the N-benzylated derivative (S)-27 gave the opposite enantiomeric products. The tentative transition state models to account for the observed product stereoselectivity with morpholine ligands holding the geminal diphenyl group on the beta-amino alcohol segment are proposed. (c) 2006 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2005.12.027
• 作为产物：
  描述：

  (2R)-2-(tert-butoxycarbonylamino)-3-(tert-butyldiphenylsilyloxy)propan-1-ol 在 sodium hydroxide 、 锂硼氢 、 四丁基碘化铵 、 二异丁基氢化铝 、 三乙胺 、 N,N-二异丙基乙胺 、 三氟乙酸 作用下， 以 甲醇 、 乙醚 、 二氯甲烷 、 甲苯 为溶剂， 反应 22.0h， 生成 (R)-3-(tert-butyldiphenylsilyloxymethyl)morpholine
  参考文献：
  名称：

  Synthesis of chiral C/N-functionalized morpholine alcohols: study of their catalytic ability as ligand in asymmetric diethylzinc addition to aldehyde

  摘要：

  A broad variety of chiral C/N-functionalized morpholine alcohols sharing a common structural motif in the 3-(hydroxy-methyl)morpholine 6 were prepared froin criantiomerically pure serine for the purpose of studying their catalytic ligand properties. The asymmetric addition of diethylzinc to benzaldehyde in the presence of 10 mol % of chiral C/N-functionalized morpholine alcohols gave 1-phenyl-1-propanol in 59-81% yield with 10-30% ee. The addition of 10 mol % of n-butyl lithium to the reaction mixture resulted in a significant enhancement of the stereoselectivity in the case of ligands bearing the two geminal phenyl substituents on the backbone. In the presence of n-butyl lithium and using (S)-3-(hydroxydiphcnylmethyl)morpholine (S)-19 as the chiral promoter, (S)-1-phenyl-1 -propanol was obtained in 81% yield with 76% ee. The geminal diphenyl-class of morpholine ligands was examined for the diethylzinc addition to four different aldehydes in the presence of n-butyl lithium. (S)-N-Benzyl-3-(hydroxydiphenymethyl)morpholine (S)-27 was found to be most enantioselective in the case of 4-metlioxybenzaldehyde to give (R)-alcohol in 87K yield with 80% ee. Catalysts (S)-19 and its N-methyl derivative (S)-26 gave alcohols with an (S)-absolute configuration while the N-benzylated derivative (S)-27 gave the opposite enantiomeric products. The tentative transition state models to account for the observed product stereoselectivity with morpholine ligands holding the geminal diphenyl group on the beta-amino alcohol segment are proposed. (c) 2006 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2005.12.027

文献信息

• Synthesis of chiral C/N-functionalized morpholine alcohols: study of their catalytic ability as ligand in asymmetric diethylzinc addition to aldehyde
  作者：Rajesh Dave、N. André Sasaki

  DOI：10.1016/j.tetasy.2005.12.027

  日期：2006.2

  A broad variety of chiral C/N-functionalized morpholine alcohols sharing a common structural motif in the 3-(hydroxy-methyl)morpholine 6 were prepared froin criantiomerically pure serine for the purpose of studying their catalytic ligand properties. The asymmetric addition of diethylzinc to benzaldehyde in the presence of 10 mol % of chiral C/N-functionalized morpholine alcohols gave 1-phenyl-1-propanol in 59-81% yield with 10-30% ee. The addition of 10 mol % of n-butyl lithium to the reaction mixture resulted in a significant enhancement of the stereoselectivity in the case of ligands bearing the two geminal phenyl substituents on the backbone. In the presence of n-butyl lithium and using (S)-3-(hydroxydiphcnylmethyl)morpholine (S)-19 as the chiral promoter, (S)-1-phenyl-1 -propanol was obtained in 81% yield with 76% ee. The geminal diphenyl-class of morpholine ligands was examined for the diethylzinc addition to four different aldehydes in the presence of n-butyl lithium. (S)-N-Benzyl-3-(hydroxydiphenymethyl)morpholine (S)-27 was found to be most enantioselective in the case of 4-metlioxybenzaldehyde to give (R)-alcohol in 87K yield with 80% ee. Catalysts (S)-19 and its N-methyl derivative (S)-26 gave alcohols with an (S)-absolute configuration while the N-benzylated derivative (S)-27 gave the opposite enantiomeric products. The tentative transition state models to account for the observed product stereoselectivity with morpholine ligands holding the geminal diphenyl group on the beta-amino alcohol segment are proposed. (c) 2006 Elsevier Ltd. All rights reserved.