Boc-Thr(Bn)-N(Me)Val-OMe | 194933-46-5

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: Boc-Thr(Bn)-N(Me)Val-OMe
• 英文别名: methyl (2S)-3-methyl-2-[methyl-[(2S,3R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-phenylmethoxybutanoyl]amino]butanoate
• CAS: 194933-46-5
• 化学式: C₂₃H₃₆N₂O₆
• 分子量: 436.549
• InChiKey: WHJXJMKZOXXAOI-NEWSRXKRSA-N

物化性质

• 沸点：
  549.9±50.0 °C(Predicted)
• 密度：
  1.097±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.6
• 重原子数：
  31
• 可旋转键数：
  12
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.61
• 拓扑面积：
  94.2
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  Boc-Thr(Bn)-N(Me)Val-OMe 在 palladium on activated charcoal 盐酸 、 lithium hydroxide 、 氢气 、 双(2-氧代-3-恶唑烷基)次磷酰氯 、 (benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、 三乙胺 、 N,N-二异丙基乙胺 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 甲醇 、 乙醇 、 二氯甲烷 、 水 、 乙腈 为溶剂， 反应 25.5h， 生成 (S)-2-[((2S,3R)-2-{(S)-2-[((2R,4R)-2,4-Dimethyl-octanoyl)-methyl-amino]-4-methyl-pentanoylamino}-3-hydroxy-butyryl)-methyl-amino]-3-methyl-butyric acid
  参考文献：
  名称：

  Synthesis of Microcolin B, a Potent New Immunosuppressant Using an Efficient Mixed Imide Formation Reaction

  摘要：

  Microcolin B, a potent new immunosuppressant isolated from blue-green alga Lyngbya majuscula off the Venezuelan coast, has been made using a methyl-directed asymmetric hydrogenation reaction with rhodium on alumina catalyst on lactone 4 for the synthesis of the key (R,R)-2,4-dimethyloctanoic acid fragment 1. A new, direct mixed imide formation reaction was also developed for the production of the unusual prolylpyrrolen-2-one 2 portion of microcolin. The pentafluorophenyl ester of CBZ-proline 5 was reacted with the lithium imidate of lactam 6, providing the mixed imide in 80% yield. Coupling of acid 1 with the N-terminus of the tripeptide, followed by coupling with pyrrolylproline 2, gave microcolin B. The new mixed-imide forming reaction was also applied to a formal total synthesis of microcolin A. The pentafluorophenyl ester of TBS-protected cis-hydroxyproline was coupled with lactam 6, and the resultant imide was converted to the key pyrrolylproline made previously far microcolin A.

  DOI：

  10.1021/jo970387x
• 作为产物：
  描述：

  Boc-N-甲基-L-缬氨酸 在 盐酸 、 双(2-氧代-3-恶唑烷基)次磷酰氯 、 三乙胺 作用下， 以 1,4-二氧六环 、 乙醚 、 二氯甲烷 为溶剂， 反应 3.0h， 生成 Boc-Thr(Bn)-N(Me)Val-OMe
  参考文献：
  名称：

  Synthesis of Microcolin B, a Potent New Immunosuppressant Using an Efficient Mixed Imide Formation Reaction

  摘要：

  Microcolin B, a potent new immunosuppressant isolated from blue-green alga Lyngbya majuscula off the Venezuelan coast, has been made using a methyl-directed asymmetric hydrogenation reaction with rhodium on alumina catalyst on lactone 4 for the synthesis of the key (R,R)-2,4-dimethyloctanoic acid fragment 1. A new, direct mixed imide formation reaction was also developed for the production of the unusual prolylpyrrolen-2-one 2 portion of microcolin. The pentafluorophenyl ester of CBZ-proline 5 was reacted with the lithium imidate of lactam 6, providing the mixed imide in 80% yield. Coupling of acid 1 with the N-terminus of the tripeptide, followed by coupling with pyrrolylproline 2, gave microcolin B. The new mixed-imide forming reaction was also applied to a formal total synthesis of microcolin A. The pentafluorophenyl ester of TBS-protected cis-hydroxyproline was coupled with lactam 6, and the resultant imide was converted to the key pyrrolylproline made previously far microcolin A.

  DOI：

  10.1021/jo970387x

文献信息

• Synthesis of Microcolin B, a Potent New Immunosuppressant Using an Efficient Mixed Imide Formation Reaction
  作者：Merritt B. Andrus、Wenke Li、Robert F. Keyes

  DOI：10.1021/jo970387x

  日期：1997.8.1

  Microcolin B, a potent new immunosuppressant isolated from blue-green alga Lyngbya majuscula off the Venezuelan coast, has been made using a methyl-directed asymmetric hydrogenation reaction with rhodium on alumina catalyst on lactone 4 for the synthesis of the key (R,R)-2,4-dimethyloctanoic acid fragment 1. A new, direct mixed imide formation reaction was also developed for the production of the unusual prolylpyrrolen-2-one 2 portion of microcolin. The pentafluorophenyl ester of CBZ-proline 5 was reacted with the lithium imidate of lactam 6, providing the mixed imide in 80% yield. Coupling of acid 1 with the N-terminus of the tripeptide, followed by coupling with pyrrolylproline 2, gave microcolin B. The new mixed-imide forming reaction was also applied to a formal total synthesis of microcolin A. The pentafluorophenyl ester of TBS-protected cis-hydroxyproline was coupled with lactam 6, and the resultant imide was converted to the key pyrrolylproline made previously far microcolin A.