dimethyl 1,6-dimethylheptalene-4,5-dicarboxylate | 175396-02-8

• 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: dimethyl 1,6-dimethylheptalene-4,5-dicarboxylate
• 英文别名: Dimethyl 5,10-dimethylheptalene-1,2-dicarboxylate；dimethyl 5,10-dimethylheptalene-1,2-dicarboxylate
• CAS: 175396-02-8
• 化学式: C₁₈H₁₈O₄
• 分子量: 298.339
• InChiKey: CEMOVAQAJIASGJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.5
• 重原子数：
  22
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  dimethyl 1,6-dimethylheptalene-4,5-dicarboxylate 在 氢氧化钾 、 正丁基锂 作用下， 以 甲醇 、 乙醇 、 水 、 N,N-二甲基甲酰胺 、 甲苯 、 乙腈 为溶剂， 反应 19.0h， 生成 7,12-dimethyl-3-(phenylsulfonyl)benzo[a]heptalene-2,4-diol
  参考文献：
  名称：

  秋水仙素的可变合成研究：在庚烯部分构建环 A

  摘要：

  It is shown that heptalene-4,5-dicarboxylates 2, which react with lithiated methyl sulfones mainly in a Michael fashion at C(3) (cf. Scheme-2), so that the formation of 3-sulfonylbenzo[a]heptalene-2,4-diols 5 is repressed or completely suppressed, can be transformed into corresponding pseudo-esters 15 (Scheme 4). These pseudo-esters, on treatment with lithiated methyl sulfones, followed by addition of BuLi, furnish the 3-sulfonylbenzo[a]heptalene-2,4-diols 5 in excellent-to-moderate yields without formation of Michael adducts or their follow-up products (cf. Scheme 5 and 6). The reaction of the pseudo-ester 15a with Li[C-13]H2SO2Ph, followed by treatment with non-labeled FiCH(2)SO(2)Ph and then BuLi, led to the exclusive formation of 3-(phenylsulfonyl)-[1-C-13]benzo[a]heptalene-2,4-diol 5a* (Scheme 9). This experiment demonstrates that the (phenylsulfonyl)acetyl groups at C(4) and C(5) of the heptalene core retain their individual positions in the course of the benzo[a]heptalene-2,4-diol formation. These findings are only compatible with an intramolecular rearrangement mechanism as depicted in Scheme 10.

  DOI：

  10.1002/1522-2675(20000906)83:9<2383::aid-hlca2383>3.0.co;2-0
• 作为产物：
  描述：

  1,4-dimethylazulene 、 丁炔二酸二甲酯 以 甲苯 为溶剂， 生成 dimethyl 1,6-dimethylheptalene-4,5-dicarboxylate
  参考文献：
  名称：

  庚烷-4,5-二羧酸及其假酯形式之一的新烷基化方法

  摘要：

  二甲基庚烯-4,5-二羧酸盐 1庚烷本身的定位剂在整个工作过程中都得到维护。有关推理，请参见[1]中的脚注4。在低于50° C的温度下，优先在C（3）与α-锂化的烷基苯基砜进行迈克尔加成反应，从而导致相应的顺式构型的3,4-二氢庚二烯-4,5-二羧酸酯（参见表1，方案3和4）。相应的庚二烯-4,5-二羧酸二甲基庚酯的呋喃基呋喃-1-酮假酯（方案5）几乎仅在呋喃酮基团的C（1）处与[（苯磺酰基）甲基]锂反应（方案6）。与这种预期的行为相反，只要七聚呋喃-1-酮的C（5）处会吸收1- [苯磺酰基）乙基]锂，只要它们在C（11）处带有Me基（方案6和7）。在THF中用MeONa / MeOH处理后，1,4和1,6加成产物消除了苯磺酸盐，从而分别导致了3和4烷基化的二甲基庚烯-4,5-二羧酸盐（方案8 – 13）。亲核试剂的固有的手性heptalenes的加成反应的结构进行详细讨论（参见方案14 -

  DOI：

  10.1002/hlca.201100510

文献信息

• A New Alkylation Method for Heptalene-4,5-dicarboxylates and of One of Their Pseudoester Forms
  作者：Khaled Abou-Hadeed、Zoltàn A. Molnar、Pinar Göksaltık、Roland W. Kunz、Anthony Linden、Hans-Jürgen Hansen

  DOI：10.1002/hlca.201100510

  日期：2012.6

  Dimethyl heptalene‐4,5‐dicarboxylates 1 The locants of heptalene itself are maintained throughout the whole work. See footnote 4 in [1] for reasoning. undergo preferentially a Michael addition reaction at C(3) with α‐lithiated alkyl phenyl sulfones at temperatures below −50°, leading to corresponding cis‐configured 3,4‐dihydroheptalene‐4,5‐dicarboxylates (cf. Table 1, Schemes 3 and 4). The corresponding

  二甲基庚烯-4,5-二羧酸盐 1庚烷本身的定位剂在整个工作过程中都得到维护。有关推理，请参见[1]中的脚注4。在低于50° C的温度下，优先在C（3）与α-锂化的烷基苯基砜进行迈克尔加成反应，从而导致相应的顺式构型的3,4-二氢庚二烯-4,5-二羧酸酯（参见表1，方案3和4）。相应的庚二烯-4,5-二羧酸二甲基庚酯的呋喃基呋喃-1-酮假酯（方案5）几乎仅在呋喃酮基团的C（1）处与[（苯磺酰基）甲基]锂反应（方案6）。与这种预期的行为相反，只要七聚呋喃-1-酮的C（5）处会吸收1- [苯磺酰基）乙基]锂，只要它们在C（11）处带有Me基（方案6和7）。在THF中用MeONa / MeOH处理后，1,4和1,6加成产物消除了苯磺酸盐，从而分别导致了3和4烷基化的二甲基庚烯-4,5-二羧酸盐（方案8 – 13）。亲核试剂的固有的手性heptalenes的加成反应的结构进行详细讨论（参见方案14 -
• Studies for a Variable Synthesis of Colchicinoids: Construction of Ring A on a Heptalene Moiety
  作者：Markus Meyer、Khaled Abou-Hadeed、Hans-Jürgen Hansen

  DOI：10.1002/1522-2675(20000906)83:9<2383::aid-hlca2383>3.0.co;2-0

  日期：2000.9.6

  It is shown that heptalene-4,5-dicarboxylates 2, which react with lithiated methyl sulfones mainly in a Michael fashion at C(3) (cf. Scheme-2), so that the formation of 3-sulfonylbenzo[a]heptalene-2,4-diols 5 is repressed or completely suppressed, can be transformed into corresponding pseudo-esters 15 (Scheme 4). These pseudo-esters, on treatment with lithiated methyl sulfones, followed by addition of BuLi, furnish the 3-sulfonylbenzo[a]heptalene-2,4-diols 5 in excellent-to-moderate yields without formation of Michael adducts or their follow-up products (cf. Scheme 5 and 6). The reaction of the pseudo-ester 15a with Li[C-13]H2SO2Ph, followed by treatment with non-labeled FiCH(2)SO(2)Ph and then BuLi, led to the exclusive formation of 3-(phenylsulfonyl)-[1-C-13]benzo[a]heptalene-2,4-diol 5a* (Scheme 9). This experiment demonstrates that the (phenylsulfonyl)acetyl groups at C(4) and C(5) of the heptalene core retain their individual positions in the course of the benzo[a]heptalene-2,4-diol formation. These findings are only compatible with an intramolecular rearrangement mechanism as depicted in Scheme 10.