9H-fluoren-9-ylmethyl N-[(1S,2S)-2-hydroxy-2-(4-methoxyphenyl)-1-(4-methyl-2,6,7-trioxabicyclo[2.2.2]octan-1-yl)ethyl]carbamate | 206191-20-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 芴
• 英文名称: 9H-fluoren-9-ylmethyl N-[(1S,2S)-2-hydroxy-2-(4-methoxyphenyl)-1-(4-methyl-2,6,7-trioxabicyclo[2.2.2]octan-1-yl)ethyl]carbamate
• CAS: 206191-20-0
• 化学式: C₃₀H₃₁NO₇
• 分子量: 517.579
• InChiKey: DBQJGUVFLPGEHE-MZPAMKPDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.8
• 重原子数：
  38
• 可旋转键数：
  8
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.37
• 拓扑面积：
  95.5
• 氢给体数：
  2
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  9H-fluoren-9-ylmethyl N-[(1S,2S)-2-hydroxy-2-(4-methoxyphenyl)-1-(4-methyl-2,6,7-trioxabicyclo[2.2.2]octan-1-yl)ethyl]carbamate 在 哌啶 、 caesium carbonate 、 三氟乙酸 作用下， 生成 (2S,3S)-2-氨基-3-羟基-3-(4-甲氧基苯基)丙酸
  参考文献：
  名称：

  Stereoselective Synthesis of Threo and Erythro β-Hydroxy and β-Disubstituted-β-Hydroxy α-Amino Acids

  摘要：

  Optically pure N-protected serine aldehyde equivalents can be prepared by the protection of the carboxylic group of serine by a cyclic ortho ester. Alkylation of N-Cbz-, N-Fmoc- or N-Boc-protected serine with oxetane tosylate 1 or bromide 2 gives the corresponding oxetane esters 4a-c which can easily be converted to the cyclic ortho esters 5a-c. A variety of unusual threo beta-hydroxy amino acids have been synthesized by Grignard addition to these optically pure serine aldehyde equivalents. The erythro diastereomers can be obtained by oxidation of the initial three adduct followed by reduction with LiBH4. Also described is a general approach for the diastereoselective synthesis of optically pure beta,beta-dialkyl-beta-hydroxy alpha-amino acids. These highly substituted amino acids are prepared by a sequence of Grignard addition to the optically active serine aldehyde equivalent, followed by oxidation of the initial adduct, and a second Grignard addition to the resulting ketone. The hydroxy adduct is obtained with very high diastereoselectivity (84-96% de). All four diastereomers can be selectively synthesized by varying the order of the Grignard additions and the chirality of the initial synthon. Removal of the protecting groups can be effected in very mild conditions, giving excellent yields of highly substituted amino acids in high diastereomeric purity.

  DOI：

  10.1021/jo972294l
• 作为产物：
  描述：

  3-甲基-3-羟甲基氧杂环丁烷 在 草酰氯 、 TEA 、 三氟化硼乙醚 、 caesium carbonate 、 二甲基亚砜 、 N,N-二异丙基乙胺 、 sodium bromide 作用下， 以 吡啶 、 乙醚 、 丙酮 为溶剂， 反应 64.5h， 生成 9H-fluoren-9-ylmethyl N-[(1S,2S)-2-hydroxy-2-(4-methoxyphenyl)-1-(4-methyl-2,6,7-trioxabicyclo[2.2.2]octan-1-yl)ethyl]carbamate
  参考文献：
  名称：

  Stereoselective Synthesis of Threo and Erythro β-Hydroxy and β-Disubstituted-β-Hydroxy α-Amino Acids

  摘要：

  Optically pure N-protected serine aldehyde equivalents can be prepared by the protection of the carboxylic group of serine by a cyclic ortho ester. Alkylation of N-Cbz-, N-Fmoc- or N-Boc-protected serine with oxetane tosylate 1 or bromide 2 gives the corresponding oxetane esters 4a-c which can easily be converted to the cyclic ortho esters 5a-c. A variety of unusual threo beta-hydroxy amino acids have been synthesized by Grignard addition to these optically pure serine aldehyde equivalents. The erythro diastereomers can be obtained by oxidation of the initial three adduct followed by reduction with LiBH4. Also described is a general approach for the diastereoselective synthesis of optically pure beta,beta-dialkyl-beta-hydroxy alpha-amino acids. These highly substituted amino acids are prepared by a sequence of Grignard addition to the optically active serine aldehyde equivalent, followed by oxidation of the initial adduct, and a second Grignard addition to the resulting ketone. The hydroxy adduct is obtained with very high diastereoselectivity (84-96% de). All four diastereomers can be selectively synthesized by varying the order of the Grignard additions and the chirality of the initial synthon. Removal of the protecting groups can be effected in very mild conditions, giving excellent yields of highly substituted amino acids in high diastereomeric purity.

  DOI：

  10.1021/jo972294l

文献信息

• Stereoselective Synthesis of <i>Threo</i> and <i>Erythro</i> β-Hydroxy and β-Disubstituted-β-Hydroxy α-Amino Acids
  作者：Mark A. Blaskovich、Ghotas Evindar、Nicholas G. W. Rose、Scott Wilkinson、Yue Luo、Gilles A. Lajoie

  DOI：10.1021/jo972294l

  日期：1998.5.1

  Optically pure N-protected serine aldehyde equivalents can be prepared by the protection of the carboxylic group of serine by a cyclic ortho ester. Alkylation of N-Cbz-, N-Fmoc- or N-Boc-protected serine with oxetane tosylate 1 or bromide 2 gives the corresponding oxetane esters 4a-c which can easily be converted to the cyclic ortho esters 5a-c. A variety of unusual threo beta-hydroxy amino acids have been synthesized by Grignard addition to these optically pure serine aldehyde equivalents. The erythro diastereomers can be obtained by oxidation of the initial three adduct followed by reduction with LiBH4. Also described is a general approach for the diastereoselective synthesis of optically pure beta,beta-dialkyl-beta-hydroxy alpha-amino acids. These highly substituted amino acids are prepared by a sequence of Grignard addition to the optically active serine aldehyde equivalent, followed by oxidation of the initial adduct, and a second Grignard addition to the resulting ketone. The hydroxy adduct is obtained with very high diastereoselectivity (84-96% de). All four diastereomers can be selectively synthesized by varying the order of the Grignard additions and the chirality of the initial synthon. Removal of the protecting groups can be effected in very mild conditions, giving excellent yields of highly substituted amino acids in high diastereomeric purity.