syn-proximal-25,26-bis<(2-pyridylmethyl)oxy>-27,28-dihydroxycalix<4>arene | 123207-98-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: syn-proximal-25,26-bis<(2-pyridylmethyl)oxy>-27,28-dihydroxycalix<4>arene
• 英文别名: syn-proximal-25,26-bis[(2-pyridylmethyl)oxy]-27,28-dihydroxycalix[4]arene；27,28-Bis(pyridin-2-ylmethoxy)pentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(24),3(28),4,6,9,11,13(27),15,17,19(26),21(25),22-dodecaene-25,26-diol
• CAS: 123207-98-7
• 化学式: C₄₀H₃₄N₂O₄
• 分子量: 606.721
• InChiKey: XDLHAEUHIRXQSR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.8
• 重原子数：
  46
• 可旋转键数：
  6
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.15
• 拓扑面积：
  84.7
• 氢给体数：
  2
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  (-)-(S)-2,2'-bis[5-tosyloxy-3-oxa-1-pentyloxy]-1,1'-binaphthyl 、 syn-proximal-25,26-bis<(2-pyridylmethyl)oxy>-27,28-dihydroxycalix<4>arene 在 potassium tert-butylate 作用下， 生成 25,26-bis-<(2-pyridylmethyl)oxy>-27,28-(2,2'-binaphthyl-crown-6)-calix<4>arene, cone conformer
  参考文献：
  名称：

  1,2-Bridged Calix[4]arene Monocrowns and Biscrowns in the 1,2-Alternate Conformation

  摘要：

  The condensation of 1, 2-di[(2-pyridylmethyl)oxy]calix[4]arenes 1 (R = Bu-t, H) with glycol ditosylates 2a-e in anhydrous toluene in the presence of (BuOK)-Bu-t has led to a mixture of 1,2-alternate and cone 1,2-calix[4]arene crown conformers 3 and 4, respectively. Similarly, the reaction of 1,2-bridged calix[4]arene crown-4 5 with tri- to pentaethylene glycol ditosylates 2a-c has produced 1,2-alternate and cone calix[4]arene biscrown conformers 6 and 7, respectively. The distribution of conformers depends on the para-substituent at the upper rim and the length and bulkiness of the ditosylates. The best yields of the 1,2-alternate conformer (up to 51%) are observed in the absence of tBu groups and with the longer polyether chain. The conformational features of 3 and 6 have been deduced by NMR spectroscopy and by X-ray crystallography. X-ray analysis of 25,26-27,28-biscrown-4-calix[4]arene (6a) shows that there are two independent molecules in the asymmetric unit, both in the 1,2-alternate conformation.

  DOI：

  10.1021/jo9810516
• 作为产物：
  描述：

  杯[4]芳烃 、 2-氯甲基吡啶盐酸盐 在 sodium hydride 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 以10%的产率得到25,26,27-tris<(2-pyridylmethyl)oxy>-28-hydroxycalix<4>arene
  参考文献：
  名称：

  Functionalization of calix[4]arenes by alkylation with 2-(chloromethyl)pyridine hydrochloride

  摘要：

  The syntheses, structures, and conformations of nine of the 13 possible [(2-pyridylmethyl)oxy]calix[4]arene conformers obtainable by direct substitution on calix[4]arenes 1a,b are described. The conformer distribution in the exhaustive O-alkylation of 1a,b with 2-(chloromethyl)pyridine hydrochloride (PicCl.HCl) in N, N,N-dimethylformamide (DMF) is strongly affected by the base applied: NaH induces only cone conformers, while K2CO3 or Cs2CO3 lead preferentially to partial cone and/or 1,3-alternate conformers, depending on the para substituent of the starting calix[4]arene. Single-crystal X-ray analyses on tetra-O-alkylated cone 1k,1 and partial cone 2c have been conducted. Molecule 1k has a distorted cone conformation with pendant OCH2Py groups; a methanol of solvation is hydrogen bonded to one pyridine N atom and is exo to the calix cavity. The crystal structure of 11 contains two independent distorted cone shaped molecules per asymmetric unit which differ principally in the relative orientations of the OCH2Py groups. In the partial cone conformer 2c the conformation adopted is such that the pendant OCH2Py group of the rotated aryl ring lies in, and effectively fills, the calix cavity produced by the remaining three aryl rings; as in 1k a methanol of solvation is hydrogen bonded to a pyridine N atom exo to the calix cavity. Regioselective syn-proximal (1,2-) or syn-distal (1,3-) difunctionalization at the lower rim of calix[4]arenes has been also achieved. Syn-1,2-disubstituted derivatives have proved to be useful intermediates for the stereoselective synthesis of tri-O-alkylated cone conformers, calix[4]arenes with mixed ligating groups in the sequence AABB at the lower rim, for inherently chiral calix[4]arenes, and for the transfer of proximal regioselectivity from the lower to the upper rim. On the basis of stepwise O-alkylation of calix[4]arenes, and with the aid of MM2 calculations on the involved intermediates and their anions, a possible genesis of the various conformers is proposed.

  DOI：

  10.1021/jo00035a016

文献信息

• Novel 1,2-bridged calix[4]crowns in the 1,2-alternate conformation
  作者：Sebastiano Pappalardo、Ada Petringa、Melchiorre F. Parisi、George Ferguson

  DOI：10.1016/0040-4039(96)00686-7

  日期：1996.5

  Treatment of 1,2-di[(2-pyridylmethyl)oxy]calix[4]arenes 1 (R = t-Bu, H) with tri- to pentaethylene glycol ditosylates in anhydrous toluene in the presence of t-BuOK affords a mixture of 1,2-alternate and cone (1,2)-calix[4]crown conformers 2 and 3 in a 55–70% overall yield. The conformational features of 2 have been deduced by NMR, and further confirmed by single-crystal X-ray analysis on crown-5 derivative

  在t -BuOK存在下，在无水甲苯中用三至五乙二醇二甲苯磺酸酯处理1,2-二[（2-吡啶基甲基）氧基]杯[4]芳烃1（R = t -Bu，H）1,2-交替和圆锥（1,2）-杯[4]冠状构象异构体2和3的总产率为55-70％。的构象特征2已经通过NMR推导出，并且进一步通过单晶X射线分析对冠-5衍生物证实2E。
• Calix[4]arenes with pyridine pendant groups. Regioselective proximal alkylation at the "lower rim"
  作者：Francesco Bottino、Luigi Giunta、Sebastiano Pappalardo

  DOI：10.1021/jo00284a001

  日期：1989.11