oxacycloheneicos-11-en-2-one | 75722-68-8

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 大环内酯类和类似物
• 英文名称: oxacycloheneicos-11-en-2-one
• 英文别名: 10-eicosen-20-olide；1-Oxacyclohenicos-11-en-2-one
• CAS: 75722-68-8
• 化学式: C₂₀H₃₆O₂
• 分子量: 308.505
• InChiKey: LOPQEODTCZEUEM-UHFFFAOYSA-N

物化性质

• 沸点：
  458.2±24.0 °C(Predicted)
• 密度：
  0.873±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  7.7
• 重原子数：
  22
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.85
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  oxacycloheneicos-11-en-2-one 在 palladium on activated charcoal 氢气 作用下， 以 乙酸乙酯 为溶剂， 反应 6.0h， 以82%的产率得到oxacycloheneicosan-2-one
  参考文献：
  名称：

  二异丁基氢化铝促进的醛的Tishchenko反应及其在大环内酯形成中的应用

  摘要：

  脂肪醛与正戊烷中催化量的Dibal-H反应，以良好至极好的收率得到相应的季申科产品。相反，在类似条件下，α-甲硅烷氧基醛通过Oppenauer氧化生成α-甲硅烷氧基酮。ω-烯烃醛的Tishchenko反应，然后进行RCM和氢化提供了一种方便的方法来制备11-37元大环内酯。

  DOI：

  10.1016/j.tet.2007.08.074
• 作为产物：
  描述：

  10-十一烯-1-醇 在 Grubbs catalyst first generation 作用下， 以 二氯甲烷 为溶剂， 生成 oxacycloheneicos-11-en-2-one
  参考文献：
  名称：

  Conformationally Unbiased Macrocyclization Reactions by Ring Closing Metathesis

  摘要：

  DOI：

  10.1021/jo960733v

文献信息

• A most user-friendly protocol for ring closing metathesis reactions
  作者：Alois Fürstner、Lutz Ackermann

  DOI：10.1039/a808810a

  日期：——

  Ring closing metathesis reactions (RCM) can be conveniently achieved in a photo-assisted manner simply by heating a solution of the diene substrate, catalytic amounts of commercially available [(p-cymene)RuCl2]2 4 and PCy3 in CH2Cl2 under neon light.

  环闭合复分解反应（RCM）可通过光辅助方式便捷地实现，仅需在氖光下加热含有二烯底物、市售的[(p-枯烯)RuCl2]24和PCy3催化量的CH2Cl2溶液即可。
• Metathesis reactions of unsaturated esters catalyzed by homogenous tungsten complexes. Syntheses of civetone and macrolides
  作者：Jiro Tsuji、Shohei Hashiguchi

  DOI：10.1016/s0022-328x(00)80988-2

  日期：1981.9

  obtained by the metathesis of ethyl oleate, was subjected to the Dieckmann cyclization. The cyclized product was decarboxylated to give civetone as a mixture of the cis and trans isomers. Preliminary studies of macrolide synthesis by the intramolecular metathesis of oleyl oleate and 10-undecenyl 10-undecenoate to afford 9-octadecen-18-olide and 10-eicosen-20-olide, respectively, have been carried out.

  甲基10-十一烯酸的复分解反应，油酸甲酯和油乙酸在使用WCL进行了6和WOCL 4作为primarycatalysts和SnMe 4，PbMe 4中，Cp 2时间2，1和Cp 2 ZrMe 2作为助催化剂。发现催化剂体系WOCl 4 / Cp 2 TiMe 2对于不饱和酯的复分解非常活跃，并且比体系WCl 6 / SnMe 4更好。。将通过油酸乙酯复分解获得的9-十八碳烯-1,18-二酸二乙酯进行狄克曼环化。使环化产物脱羧，得到西维酮，为顺式和反式异构体的混合物。通过油酸油酯和10-十一碳烯基10-十一碳烯酸酯的分子内复分解合成大环内酯的初步研究已经分别得到9-十八碳烯-18-内酰胺和10-二十碳烯-20-内酰胺。
• Macrocycles by Ring-Closing Metathesis
  作者：Alois Fürstner、Klaus Langemann

  DOI：10.1055/s-1997-4472

  日期：1997.7

  The ruthenium carbene complexes 1 and 2 (0.05-5 mol%) catalyse highly efficient macrocyclization reactions of 1,ω-dienes by ring-closing metathesis (RCM). Key parameters for successful RCM are (i) the presence of a functional group which serves as a relay entity that assembles the reacting sites, (ii) an appropriate distance between this polar group and the alkenes to be metathesized, and (iii) low steric congestion near the double bonds. Contrary to previous assumptions, however, the ring size formed and the conformational predisposition of the substrates for ring closure turned out to be of minor importance. These aspects are illustrated by some straightforward syntheses of macrocyclic lactones, lactams, ethers and ketones, including the musk odored perfume ingredients Exaltolide, Exaltone and Arova 16, of the macrolide recifeiolide (24), as well as of the alkaloids epilachnene (40) and its homologue 9-propyl-10-azacyclododecan-12-olide (39), which are active principles of the defense secretions of the pupae of the mexican beetle Epilachnar varivestis .

  钌卡宾配合物1和2（0.05-5 mol%）催化通过环闭合重排（RCM）进行的高效大环化反应，涉及1,ω-二烯。成功进行RCM的关键参数为：(i) 存在一个功能团，作为中介实体，组装反应位点；(ii) 该极性基团与要重排的烯烃之间的适当距离；(iii) 双键附近较低的立体拥挤。然而，与之前的假设相反，形成的环大小和底物的环闭合构象倾向被证明重要性较小。这些方面通过一些简单的合成示例得以说明，包括大环内酯、内酰胺、醚和酮的合成，其中包括带有麝香气味的香料成分Exaltolide、Exaltone和Arova 16，以及大环药物recifeiolide (24)，以及生物碱epilachnene (40)及其同分异构体9-丙基-10-氮杂环十二烷-12-内酯 (39)，这些都是墨西哥甲虫Epilachnar varivestis蛹的防御分泌物的活性成分。
• Indenylidene Complexes of Ruthenium: Optimized Synthesis, Structure Elucidation, and Performance as Catalysts for Olefin Metathesis—Application to the Synthesis of the ADE-Ring System of Nakadomarin A
  作者：Alois Fürstner、Oliver Guth、Arno Düffels、Günter Seidel、Monika Liebl、Barbara Gabor、Richard Mynott

  DOI：10.1002/1521-3765(20011119)7:22<4811::aid-chem4811>3.0.co;2-p

  日期：2001.11.19

  complex 3 is as good as or even superior to the classical Grubbs carbene 1 in terms of yield, reaction rate, and tolerance towards polar functional groups. Complex 3 turns out to be the catalyst of choice for the synthesis of the enantiopure core segment 77 of the marine alkaloid nakadomarin A 60 comprising the ADE rings of this target. Together with a series of other examples, this particular application

  描述了钌苯基茚基亚烷基络合物3的优化且大规模适用的合成，其使用市售的二苯基炔丙醇5作为稳定且方便的卡宾源。通过对该化合物的NMR光谱进行全面分析，排除了先前对该化合物的实际结构的歧义。闭环复分解（RCM）反应的一系列应用表明，在收率，反应速率和对极性官能团的耐受性方面，配合物3与经典的Grubbs卡宾1一样好，甚至更好。络合物3被证明是用于合成包含该靶标的ADE环的海洋生物碱中型抗癌蛋白A 60的对映纯核心链段77的选择催化剂。再加上一系列其他示例，该特定的应用说明了催化剂3特别适合于通过RCM环化中型环。通往nakadomarin A的其他关键步骤是高度选择性的分子内迈克尔加成，将四元中心置于A和D环的交界处，以及醛73与CH2I2，Ti（OiPr）4和活性锌粉的Takai-Nozaki烯化反应。
• Ruthenium Carbene Complexes with <i>N</i>,<i>N</i>‘-Bis(mesityl)imidazol-2-ylidene Ligands:  RCM Catalysts of Extended Scope
  作者：Alois Fürstner、Oliver R. Thiel、Lutz Ackermann、Hans-Jörg Schanz、Steven P. Nolan

  DOI：10.1021/jo9918504

  日期：2000.4.1

  The ruthenium carbene complexes 3a,b bearing imidazol-2-ylidene ligands constitute excellent precatalysts for ring-closing metathesis (RCM) reactions allowing the formation of tri- and tetrasubstituted cycloalkenes. They also apply to annulations that are beyond the scope of the standard Grubbs carbene 1 as well as to ring-closing reactions of acrylic acid derivatives even if the resulting alpha,beta-unsaturated lactones (or lactams) are tri- or tetrasubstituted. The reactivity of 3a was found to be highly dependent on the reaction medium: particularly high reaction rates are observed in toluene, although this solvent also leads to an increased tendency of the catalyst to isomerize the double bonds of the substrates.