(R,R)-2,4-dimethyl octanoic acid | 177607-88-4

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: (R,R)-2,4-dimethyl octanoic acid
• 英文别名: (2R,4R)-2,4-Dimethyloctanoic acid
• CAS: 177607-88-4
• 化学式: C₁₀H₂₀O₂
• 分子量: 172.268
• InChiKey: BBRLCIVWEAHSPK-RKDXNWHRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.6
• 重原子数：
  12
• 可旋转键数：
  6
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.9
• 拓扑面积：
  37.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (R,R)-2,4-dimethyl octanoic acid 在 palladium on activated charcoal lithium hydroxide 、 氢气 、 双(2-氧代-3-恶唑烷基)次磷酰氯 、 三乙胺 作用下， 以 四氢呋喃 、 甲醇 、 乙醇 、 二氯甲烷 、 水 为溶剂， 反应 19.5h， 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：

  [(2R)-2-methylhexyl] trifluoromethanesulfonate 在 lithium hydroxide 、 双氧水 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 、 水 为溶剂， 反应 5.25h， 生成 (R,R)-2,4-dimethyl octanoic acid
  参考文献：
  名称：

  Total Asymmetric Synthesis of the Potent Immunosuppressive Marine Natural Product Microcolin A

  摘要：

  The total asymmetric synthesis of the potent immunosuppressive compound microcolin A is reported, The synthesis establishes the absolute stereochemistry of microcolin A as C-36R, C-38R, and C-4S on the basis of the diastereoselective preparation of all four possible diastereomers of the lipid region (fragment A) and diastereoselective synthesis of fragment C starting from natural L-(S)-alanine. The strategy involves a convergent assemblage of three optically pure fragments and is amenable to chemical modifications to examine structural analogs for biological study.

  DOI：

  10.1021/jo952123l

文献信息

• Highly Convergent Total Synthesis and Assignment of Absolute Configuration of Majusculamide D, a Potent and Selective Cytotoxic Metabolite from <i>Moorea sp.</i>
  作者：Eduardo J. E. Caro-Diaz、Frederick A. Valeriote、William H. Gerwick

  DOI：10.1021/acs.orglett.8b04050

  日期：2019.2.1

  The total synthesis of majusculamide D (MJS-D) is described, a lipopentapeptide originally isolated from Lyngbya majuscula and reisolated from a Moorea sp. MJS-D possesses selective and potent cancer cell toxicity. A scalable and convergent strategy with a minimal number of purifications produced significant quantities of MJM-D for in vivo evaluations. The absolute configuration of the 1,3-dimethyl-octanamide

  描述了Majusculamide D（MJS-D）的总合成，一种脂五肽最初从Lyngbya majuscula分离出来，然后从Moorea sp。中分离出来。MJS-D具有选择性和有效的癌细胞毒性。具有最少纯化次数的可扩展且收敛的策略可产生大量MJM-D用于体内评估。通过经由ZACA化学合成该片段来确定1，3-二甲基-辛酰胺基序的绝对构型。
• Synthesis of <scp>Anti‐Pancreatic</scp> Cancer Natural Product Majusculamide D and Analogues Reveals a Preliminary <scp>Structure‐Activity</scp> Relationships
  作者：Xiuhe Zhao、Mengxue Lv、Xiaonan Xi、Yaxin Lu、Liang Wang、Yue Chen

  DOI：10.1002/cjoc.202300526

  日期：2024.3.15

  The total synthesis of majusculamide D (1) was achieved from commercially available materials. In addition, we synthesized eight analogues including three stereoisomers of majusculamide D that differ in the fatty acid chain. Six analogues including a simplified analogue 29 exhibited significant nanomolar-level IC50 values against Panc-1 cells in MTT assays. A preliminary SAR analysis indicated that

  majusculamide D ( 1 )的全合成是由市售材料实现的。此外，我们还合成了八种类似物，包括三种脂肪酸链不同的 majusculamide D 立体异构体。在 MTT 测定中，包括简化类似物29在内的六种类似物对 Panc-1 细胞表现出显着的纳摩尔水平 IC 50值。初步的SAR分析表明majusculamide D的C 10 和C 2− C 3 不饱和双键上的羟基对于维持对Panc-1细胞的高活性以及C 40-Me 和C 42-Me基团的定向至关重要是可以忍受的。
• 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.
• Total Asymmetric Synthesis of the Potent Immunosuppressive Marine Natural Product Microcolin A
  作者：Carl P. Decicco、Paul Grover

  DOI：10.1021/jo952123l

  日期：1996.1.1

  The total asymmetric synthesis of the potent immunosuppressive compound microcolin A is reported, The synthesis establishes the absolute stereochemistry of microcolin A as C-36R, C-38R, and C-4S on the basis of the diastereoselective preparation of all four possible diastereomers of the lipid region (fragment A) and diastereoselective synthesis of fragment C starting from natural L-(S)-alanine. The strategy involves a convergent assemblage of three optically pure fragments and is amenable to chemical modifications to examine structural analogs for biological study.