2-(1,4,4-trimethyl-3-phenylpenta-1,2-dienyl)pyridine

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 2-(1,4,4-trimethyl-3-phenylpenta-1,2-dienyl)pyridine
• 化学式: C₁₉H₂₁N
• 分子量: 263.382
• InChiKey: BJFGYVQFFQLVHP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.3
• 重原子数：
  20
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.26
• 拓扑面积：
  12.9
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  2-(1,4,4-trimethyl-3-phenylpenta-1,2-dienyl)pyridine 在 碘 、 potassium carbonate 作用下， 以 乙腈 为溶剂， 反应 20.0h， 以100%的产率得到2-iodo-3-(phenyl)-1-methylindolizine
  参考文献：
  名称：

  Straightforward Access to 2-Iodoindolizines via Iodine-Mediated Cyclization of 2-Pyridylallenes

  摘要：

  A metal-free access to 2-iodo-1,3-disubstituted indolizines has been developed. The proposed synthesis is relatively simple and efficient and involves the iodine-triggered 5-endo-trig cyclization of 2-pyridylallene precursors. While it can be conducted on a gram scale, the preparation of the precursors is straightforward and does not always require intermediate purifications. The obtained 2-iodoindolizines can be further functionalized through cross-coupling reactions.

  DOI：

  10.1021/acs.oprd.9b00418
• 作为产物：
  描述：

  4-phenyl-2-(pyridin-2-yl)but-3-yn-2-ol 在 4-二甲氨基吡啶 、 copper(l) cyanide 、 三乙胺 作用下， 以 四氢呋喃 、 二氯甲烷 、 正戊烷 为溶剂， 反应 26.42h， 生成 2-(1,4,4-trimethyl-3-phenylpenta-1,2-dienyl)pyridine
  参考文献：
  名称：

  Straightforward Access to 2-Iodoindolizines via Iodine-Mediated Cyclization of 2-Pyridylallenes

  摘要：

  A metal-free access to 2-iodo-1,3-disubstituted indolizines has been developed. The proposed synthesis is relatively simple and efficient and involves the iodine-triggered 5-endo-trig cyclization of 2-pyridylallene precursors. While it can be conducted on a gram scale, the preparation of the precursors is straightforward and does not always require intermediate purifications. The obtained 2-iodoindolizines can be further functionalized through cross-coupling reactions.

  DOI：

  10.1021/acs.oprd.9b00418

文献信息

• Aluminum-Catalyzed Asymmetric Alkylations of Pyridyl-Substituted Alkynyl Ketones with Dialkylzinc Reagents
  作者：Donna K. Friel、Marc L. Snapper、Amir H. Hoveyda

  DOI：10.1021/ja802935w

  日期：2008.7.1

  with Et2Zn and Me2Zn, promoted by amino acid-based chiral ligands in the presence of Al-based alkoxides, afford tertiary propargyl alcohols efficiently in 57% to >98% ee. Two easily accessible chiral ligands are identified as optimal for reactions of the two dialkylzinc reagents. Catalytic alkylations with Et2Zn require a chiral ligand carrying two amino acid moieties (valine and phenylalanine) along

  吡啶基取代的炔酮与 Et2Zn 和 Me2Zn 的烷基化，在基于氨基酸的手性配体的促进下，在基于铝的醇盐存在下，有效地提供了 57% 至 >98% ee 的叔炔丙醇。两个容易获得的手性配体被确定为两种二烷基锌试剂反应的最佳选择。使用 Et2Zn 进行催化烷基化需要一个手性配体，该配体带有两个氨基酸部分（缬氨酸和苯丙氨酸）以及一个对三氟甲基苯基酰胺 C 端。相比之下，与 Me2Zn 的反应在含有单个氨基酸（苄基半胱氨酸）的手性配体存在下最有效地促进，由正丁基酰胺封端。带有吡啶基和炔烃取代基的对映异构体富集的叔醇可以通过多种方式进行功能化，以提供各种难以获得的无环和杂环结构；两个值得注意的例子是铜催化的协议，用于将叔炔醇转化为对映异构富集的四取代丙二烯和带有 N 取代季碳立体中心的双环酰胺。提供了解释趋势和对映选择性水平的机械模型。
• Straightforward Access to 2-Iodoindolizines via Iodine-Mediated Cyclization of 2-Pyridylallenes
  作者：Thibaut Martinez、Ismail Alahyen、Gilles Lemière、Virginie Mouriès-Mansuy、Louis Fensterbank

  DOI：10.1021/acs.oprd.9b00418

  日期：2020.5.15

  A metal-free access to 2-iodo-1,3-disubstituted indolizines has been developed. The proposed synthesis is relatively simple and efficient and involves the iodine-triggered 5-endo-trig cyclization of 2-pyridylallene precursors. While it can be conducted on a gram scale, the preparation of the precursors is straightforward and does not always require intermediate purifications. The obtained 2-iodoindolizines can be further functionalized through cross-coupling reactions.