2-(6,7-dimethoxy-3,4-dihydroisoquinolin-2(1H)-yl)benzo[d]oxazole

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 四氢异喹啉
• 英文名称: 2-(6,7-dimethoxy-3,4-dihydroisoquinolin-2(1H)-yl)benzo[d]oxazole
• 英文别名: 2-(6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl)-1,3-benzoxazole
• 化学式: C₁₈H₁₈N₂O₃
• 分子量: 310.353
• InChiKey: QZTQMOAUXOJVLV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  23
• 可旋转键数：
  3
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.28
• 拓扑面积：
  47.7
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  2-(6,7-dimethoxy-3,4-dihydroisoquinolin-2(1H)-yl)benzo[d]oxazole 在 lithium aluminium tetrahydride 、 四(三苯基膦)钯 、 (4,4'-di-tert-butyl-2,2'-dipyridyl)-bis-(2-phenylpyridine(-1H))-iridium(III) hexafluorophosphate 、 potassium carbonate 作用下， 以 四氢呋喃 、 乙腈 为溶剂， 反应 110.0h， 生成
  参考文献：
  名称：

  钯催化和可见光光氧化还原催化相结合的胺的氧化还原-中性α-烯丙基化

  摘要：

  通过结合钯催化和可见光光氧化还原催化，实现了前所未有的胺α-烯丙基化反应。在这种双重催化过程中，无需添加其他金属还原剂（氧化还原中性）即可从相应的π-烯丙基铝中间体催化生成烯丙基自由基。通过在温和的反应条件下进行自由基交叉偶联，可以以高收率获得各种胺的烯丙基化产物。此外，该转化被应用于8-氧代小ber碱衍生物的形式合成，这些衍生物显示出潜在的抗癌特性。

  DOI：

  10.1002/anie.201409999
• 作为产物：
  描述：

  3,4-二甲氧基苯乙胺 在 N,N-二异丙基乙胺 作用下， 以 四氢呋喃 、 甲酸 为溶剂， 反应 34.0h， 生成 2-(6,7-dimethoxy-3,4-dihydroisoquinolin-2(1H)-yl)benzo[d]oxazole
  参考文献：
  名称：

  Unique Regioselectivity in the C(sp³)–H α-Alkylation of Amines: The Benzoxazole Moiety as a Removable Directing Group

  摘要：

  The benzoxazol-2-yl- substituent was found to act as a removable activating and directing group in the Ir-catalyzed alkylation of C(sp(3))-H bonds adjacent to nitrogen in secondary amines. It can be easily introduced by oxidative coupling or by an SNAr reaction, and it can be removed by hydroxide or by hydride reduction. For 1,2,3,4-tetrahydroisoquinolines, activation exclusively takes place in the 3-position. A variety of activated as well as unactivated terminal olefins are suitable reaction partners.

  DOI：

  10.1021/ol501935d

文献信息

• Photocatalyst- and transition-metal-free α-allylation of <i>N</i>-aryl tetrahydroisoquinolines mediated by visible light
  作者：Zhuohua Li、Pengju Ma、Yongzhu Tan、Yufei Liu、Min Gao、Yujun Zhang、Bo Yang、Xuan Huang、Yuan Gao、Junmin Zhang

  DOI：10.1039/c9gc04191e

  日期：——

  electron-donor–acceptor (EDA) complex between the N-aryl tetrahydroisoquinolines and an allyl or a benzyl bromide. Irradiation with purple light triggered single-electron transfer (SET) from the N-aryl tetrahydroisoquinolines to the allyl or benzyl bromide of the EDA complex, inducing the formation of the corresponding allyl or benzyl radical and the subsequent radical–radical coupling. This approach represents

  已经实现了N-芳基四氢异喹啉的方便和有效的α-烯丙基化。仅在可见光照射下无需过渡金属或光催化剂即可实现这种转变。该机制涉及N-芳基四氢异喹啉与烯丙基或苄基溴之间的新型原位生成的电子供体-受体（EDA）络合物。紫色光的照射触发了N的单电子转移（SET）-芳基四氢异喹啉与EDA络合物的烯丙基或苄基溴，诱导相应的烯丙基或苄基自由基的形成，以及随后的自由基-自由基偶联。该方法代表了N-芳基四氢异喹啉的无光催化剂和无过渡金属的α-烯丙基和苄基官能化的第一个例子。
• Electrochemically Initiated Oxidative Amination of Benzoxazoles Using Tetraalkylammonium Halides As Redox Catalysts
  作者：Wei-Jing Gao、Wei-Cui Li、Cheng-Chu Zeng、Hong-Yu Tian、Li-Ming Hu、R. Daniel Little

  DOI：10.1021/jo501736w

  日期：2014.10.17

  An electrochemically promoted coupling of benzoxazoles and amines has been developed, leading directly to the formation of 2-aminobenzoxazoles. The chemistry utilizes catalytic quantities of a tetraalkylammonium halide redox catalyst and is carried out under constant current conditions in a simple undivided cell. The use of excess chemical oxidant or large amounts of supporting electrolyte is avoided. This greatly simplifies the workup and isolation process and leads to a reduction in waste.
• Unique Regioselectivity in the C(sp³)–H α-Alkylation of Amines: The Benzoxazole Moiety as a Removable Directing Group
  作者：Günther Lahm、Till Opatz

  DOI：10.1021/ol501935d

  日期：2014.8.15

  The benzoxazol-2-yl- substituent was found to act as a removable activating and directing group in the Ir-catalyzed alkylation of C(sp(3))-H bonds adjacent to nitrogen in secondary amines. It can be easily introduced by oxidative coupling or by an SNAr reaction, and it can be removed by hydroxide or by hydride reduction. For 1,2,3,4-tetrahydroisoquinolines, activation exclusively takes place in the 3-position. A variety of activated as well as unactivated terminal olefins are suitable reaction partners.
• Redox-Neutral α-Allylation of Amines by Combining Palladium Catalysis and Visible-Light Photoredox Catalysis
  作者：Jun Xuan、Ting-Ting Zeng、Zhu-Jia Feng、Qiao-Hui Deng、Jia-Rong Chen、Liang-Qiu Lu、Wen-Jing Xiao、Howard Alper

  DOI：10.1002/anie.201409999

  日期：2015.1.26

  An unprecedented α‐allylation of amines was achieved by combining palladium catalysis and visible‐light photoredox catalysis. In this dual catalysis process, the catalytic generation of allyl radical from the corresponding π‐allylpalladium intermediate was achieved without additional metal reducing reagents (redox‐neutral). Various allylation products of amines were obtained in high yields through

  通过结合钯催化和可见光光氧化还原催化，实现了前所未有的胺α-烯丙基化反应。在这种双重催化过程中，无需添加其他金属还原剂（氧化还原中性）即可从相应的π-烯丙基铝中间体催化生成烯丙基自由基。通过在温和的反应条件下进行自由基交叉偶联，可以以高收率获得各种胺的烯丙基化产物。此外，该转化被应用于8-氧代小ber碱衍生物的形式合成，这些衍生物显示出潜在的抗癌特性。