L,L-N,N-dimethylcycloisodityrosine methyl ester | 109011-08-7

• 分子结构分类: 有机化合物 - 木脂素、新木脂素和相关化合物
• 英文名称: L,L-N,N-dimethylcycloisodityrosine methyl ester
• 英文别名: methyl (9S,12S)-4-methoxy-10-methyl-12-(methylamino)-11-oxo-2-oxa-10-azatricyclo[12.2.2.13,7]nonadeca-1(16),3,5,7(19),14,17-hexaene-9-carboxylate
• CAS: 109011-08-7
• 化学式: C₂₂H₂₆N₂O₅
• 分子量: 398.459
• InChiKey: HTHIASZPFOUXOW-ROUUACIJSA-N

物化性质

• 沸点：
  572.7±50.0 °C(Predicted)
• 密度：
  1.24±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  29
• 可旋转键数：
  4
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  77.1
• 氢给体数：
  1
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  L,L-N,N-dimethylcycloisodityrosine methyl ester 在 palladium on activated charcoal sodium hydroxide 、 三氯化铝 、 氢气 、 N,N'-二环己基碳二亚胺 作用下， 以 1,4-二氧六环 、 甲醇 、 二氯甲烷 、 乙腈 为溶剂， 反应 24.5h， 生成 deoxybouvadin
  参考文献：
  名称：

  Regioselective Synthesis of 14-Membered Biaryl Ethers: Total Synthesis of RA-VII and Deoxybouvardin.

  摘要：

  为了获得合成RA-VII（1）和去氧布瓦丁（2）的关键化合物（22a"），通过三硝酸铋介导的氧化反应对四卤酰胺5-7构建了14元环体系。二溴二氯酰胺6或溴三氯酰胺7产生了一种天然类型的14元环二烯酮（23a或23c），而四溴酰胺5则产生了一种非自然的产物19a。产物19a的形成可以通过对氧化偶联反应中可能的过渡态中间体26a-c和27a-c进行能量计算来理解。化合物23a通过常规程序（芳构化；甲基化；催化氢化）进一步转化为22a"。该中间体可以很方便地转化为1和2。因此，RA-VII（1）和去氧布瓦丁（2）的总合成首次得以实现。

  DOI：

  10.1248/cpb.43.1325
• 作为产物：
  描述：

  Boc-O-苄基-L-酪氨酸 在 palladium on activated charcoal copper(I) oxide 、 盐酸 、 tetrafluoroboric acid 、 氢气 、 sodium hydride 、 potassium carbonate 、 copper(II) nitrate 、 盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 、 乙酸乙酯 、 N,N-二甲基甲酰胺 为溶剂， 反应 26.5h， 生成 L,L-N,N-dimethylcycloisodityrosine methyl ester
  参考文献：
  名称：

  Alternative Synthesis of the Cycloisodityrosine Subunit of Deoxybouvardin, RA-VII, and Related Agents:  Reassignment of the Stereochemistry of Prior Intermediates

  摘要：

  DOI：

  10.1021/jo9604144

文献信息

• Synthesis of (9<i>R</i>,12<i>S</i>)- and (9<i>S</i>,12<i>S</i>)-Cycloisodityrosine and Their <i>N</i>-Methyl Derivatives
  作者：Dale L. Boger、Jiacheng Zhou、Robert M. Borzilleri、Seiji Nukui、Steven L. Castle

  DOI：10.1021/jo961346o

  日期：1997.4.1

  Full details of the synthesis of (9R,12S)- and (9S,12S)-cycloisodityrosine and their N-methyl derivatives are detailed based on an intramolecular nucleophilic aromatic substitution reaction for formation of the key biaryl ether with 14-membered ring macrocyclization. Their comparison with prior samples and the documentation of a facile C9 epimerization within the natural 9S series are described.

  基于分子内亲核芳族取代反应以形成具有14元环大环化的关键联芳基醚，详细描述了（9R，12S）-和（9S，12S）-环异酪氨酸及其N-甲基衍生物的合成的详细信息。描述了它们与先前样品的比较以及天然9S系列中C9差向异构酶的简便记录。
• Total synthesis of cycloisodityrosine, RA-VII, deoxybouvardin, and N29-desmethyl-RA-VII: Identification of the pharmacophore and reversal of the subunit functional roles
  作者：Dale L. Boger、Daniel Yohannes、Jiacheng Zhou、Michael A. Patane

  DOI：10.1021/ja00062a004

  日期：1993.5

  Full details of a concise total synthesis of RA-VII (1) and deoxybouvardin (2) are described based on the implementation of an effective intramolecular Ullmann reaction as the key macrocyclization reaction in the preparation of the elusive 14-membered cycloisodityrosine subunit (33) of the bicyclic hexapeptides. Subsequent coupling of 34 to tetrapeptide 17 and macrocyclization with C 2 -N 3 amide bond

  基于有效的分子内 Ullmann 反应作为制备难以捉摸的 14 元环异二酪氨酸亚基 (33) 的关键大环化反应的实施，描述了 RA-VII (1) 和脱氧布瓦丁 (2) 的简明全合成的全部细节的双环六肽。随后 34 与四肽 17 偶联以及大环化与 C 2 -N 3 酰胺键形成提供了 1 和 2。在解决有助于其抗肿瘤活性的药物的关键结构和构象特征的努力中，N 29 -去甲基-RA-制备了 VII 并详细说明了其化学、构象和初步生物学特性
• Total synthesis of deoxybouvardin and RA-VII: macrocyclization via an intramolecular Ullmann reaction
  作者：Dale L. Boger、Daniel Yohannes

  DOI：10.1021/ja00004a062

  日期：1991.2

  Ullmann condensation reaction for direct closure to the 14-membered diaryl ethers that have proven inaccessible or less accessible by alternative routes and the use of this key macrocyclization reaction in the total synthesis of RA-VII and deoxybouvardin

  我们详细介绍了实施分子内 Ullmann 缩合反应以直接封闭 14 元二芳基醚的成功研究，这些二芳基醚已证明无法通过替代途径或难以通过替代途径获得，以及在 RA-VII 的全合成中使用这种关键的大环化反应和脱氧布瓦丁
• A formal total synthesis of deoxybouvardin
  作者：Antony Bigot、René Beugelmans、Jieping Zhu

  DOI：10.1016/s0040-4020(97)00706-0

  日期：1997.8

  A synthesis of (L, L)-N,N-dimethylcycloisodityrosine 4 based on intramolecular SNAr reaction is reported. A possible explanation was proposed to account for the facile epimerization encountered in the cycloetherification of dipeptide (L,L)-10 and a solution to this problem led to a formal total synthesis of deoxybouvardin.

  -的合成（L，L）Ñ，Ñ -dimethylcycloisodityrosine 4基于分子内小号Ñ报道的Ar反应。提出了一种可能的解释，以解释在二肽（L，L）-10的环醚化中遇到的容易的差向异构化，解决该问题的方法导致了脱氧布瓦丁的正式全合成。
• N-Desmethyl Derivatives of Deoxybouvardin and RA-VII: Synthesis and Evaluation
  作者：Dale L. Boger、Jiacheng Zhou

  DOI：10.1021/ja00133a010

  日期：1995.7

  The synthesis of the complete set of seven N-desmethyl derivatives of RA-VII (8) are described. Thus, the synthesis of the four 14-membered cycloisodityrosine derivatives 21-24 and their coupling with the two tetrapeptides 32 and 33 followed by formation of the 18-membered ring with macrocyclization provided the full set of seven desmethyl derivatives 14-20 of RA-VII (8). The solution phase conformational properties of 8 and 14-20 were examined by 1D and 2D H-1 NMR to reveal the role of N-methylation on the key conformational aspects of the natural agents. In contrast to each of the simple cycloisodityrosine derivatives 21-24 which adopt a single, rigid solution conformation possessing a secondary or tertiary trans amide central to the 14-membered ring, the natural agents including 8 adopt a single predominant solution conformation (83-88%) that corresponds closely to the X-ray structure conformation which possesses an inherently disfavored cis C-30-N-29 tertiary amide central to the 14-membered cycloisodityrosine subunit. Moreover, this cis amide is the predominant conformation (85-95%) observed with N-29-desmethyl RA-VII (14) indicating that even a secondary C-30-N-29 amide adopts this inherently disfavored cis amide stereochemistry. The minor conformation of 8 observed in solution (12-17%) is shown to be derived from a minor cis C-8-N-9 tertiary amide which was not observed with its conversion to a secondary amide. Both N-9-desmethyl RA-VII (15) and N-9,N-29-desmethyl RA-VII (18) adopt exclusively a single solution conformation that corresponds to the major solution conformations of 8 and 14. This conformation contains a characteristic cis C-30-N-29 amide central to a type VI beta-turn and the cycloisodityrosine subunit, a trans C-8-N-9 amide central to a typical type II beta-turn capped with a tight Ala(4)-NH-O=C-Ala(1) hydrogen bond, and a trans C-14-N-15 N-methyl amide. In sharp contrast, removal of the N-15 methyl group within 16, 17, 19, and 20 results in the adoption of solution conformations possessing the inherently favored trans C-30-N-29 amide central to the cycloisodityrosine (14)-membered subunit. Thus, the N-15-methyl group within 8 is responsible for the agents adoption of the disfavored cis C-30-N-29 amide central to the cycloisodityrosine subunit. Importantly, preceding studies have defined the cycloisodityrosine subunit of 8 as the pharmacophore and, in a reversal of the initially assigned roles, revealed that it is the tetrapeptide housed in the 18-membered ring that induces and maintains the rigid, normally inaccessible cis C-30-N-29 amide conformation within the 14-membered cycloisodityrosine subunit. The studies detailed herein reveal that it is the N-15-methyl group that induces this conformational preference for the disfavored cis C-30-N-29 amide and that its removal results in a major conformational change with adoption of the trans C-30-N-29 amide and a loss of biological activity.Thus, the N-15-methyl group is essential for maintenance of the conformational and biological properties of 8; the N-9-methyl group is not essential, and its removal leads to exclusive population of a single biologically active conformation; and the N-29-methyl group once thought essential td the adoption of the C-30-N-29 cis amide is not essential, and its removal does not alter the conformational or biological properties of 8.