高度多样化的文库的合成对于获得药物和农用化学品发现的新先导化合物变得至关重要。在此,开发了各种嘧啶-N-杂环杂化物文库的步骤经济的多样性导向合成方法,其中将4,6-二甲氧基嘧啶核心掺入九种N-杂环中。总共 34 种结构不同的化合物是通过两步法从非常简单且市售的起始材料合成的。此外,该文库的体内生物筛选鉴定出 11 种活性化合物,这些化合物在每公顷 750 g ai 剂量下对 D. sanguinalis 表现出良好的芽后除草活性。更重要的是,嘧啶-四氢咔唑杂化物5q在相同剂量下对五种测试杂草表现出良好至优异的除草活性。嘧啶-四氢咔唑杂化物代表了一类新型除草剂,可能成为除草剂发现过程中有前途的先导化合物。
Tunable Hydride Transfer in the Redox Amination of Indoline with Aldehyde: An Attractive Intramolecular Hydrogen-Bond Effect
作者:Hui Mao、Runsheng Xu、Jieping Wan、Zhengyang Jiang、Cuirong Sun、Yuanjiang Pan
DOI:10.1002/chem.201001896
日期:2010.12.3
Hydride hijacked by “hydrogen”! N‐Alkylindoles and N‐alkylindolines were obtained in the redox amination of indoline with aldehyde, which was tuned by a hydrogen‐bond effect. Salicylaldehyde gave the indoline‐type product via intermolecular hydride transfer, while other aromatic aldehydes gave the indole‐type product via intramolecular hydride transfer.
Redox Isomerization via Azomethine Ylide Intermediates: <i>N</i>-Alkyl Indoles from Indolines and Aldehydes
作者:Indubhusan Deb、Deepankar Das、Daniel Seidel
DOI:10.1021/ol1031359
日期:2011.2.18
Indolines react with aromatic and heteroaromatic aldehydes to yield N-alkyl indoles in a benzoic acid catalyzed redox isomerization reaction. Azomethine ylides are intermediates in this process which was established by intramolecular [3 + 2] trapping experiments.
Lewis Base Catalyzed Intramolecular Reduction of Salicylaldehydes by Pinacol-Derived Chlorohydrosilane
作者:Benedicta Assoah、João R. Vale、Elina Kalenius、Luis F. Veiros、Nuno R. Candeias
DOI:10.1002/ejoc.201800544
日期:2018.6.22
Help your neighbor: A new chlorohydrosilane can reduce aromatic aldehydes when assisted by an ortho‐phenol moiety and upon activation by a Lewis base. This metal‐free reductive method was observed to be regio‐ and chemoselective as other carbonyl functionalities in the same molecule are not reduced.
Design, step-economical diversity-oriented synthesis of an N-heterocyclic library containing a pyrimidine moiety: discovery of novel potential herbicidal agents
The synthesis of highly diverse libraries has become of paramount importance for obtaining novel leads for drug and agrochemical discovery. Herein, the step-economical diversity-oriented synthesis of a library of various pyrimidine-N-heterocycle hybrids was developed, in which a 4,6-dimethoxypyrimidine core was incorporated into nine kinds of N-heterocycles. A total of 34 structurally diverse compounds
高度多样化的文库的合成对于获得药物和农用化学品发现的新先导化合物变得至关重要。在此,开发了各种嘧啶-N-杂环杂化物文库的步骤经济的多样性导向合成方法,其中将4,6-二甲氧基嘧啶核心掺入九种N-杂环中。总共 34 种结构不同的化合物是通过两步法从非常简单且市售的起始材料合成的。此外,该文库的体内生物筛选鉴定出 11 种活性化合物,这些化合物在每公顷 750 g ai 剂量下对 D. sanguinalis 表现出良好的芽后除草活性。更重要的是,嘧啶-四氢咔唑杂化物5q在相同剂量下对五种测试杂草表现出良好至优异的除草活性。嘧啶-四氢咔唑杂化物代表了一类新型除草剂,可能成为除草剂发现过程中有前途的先导化合物。
Copper-Catalyzed Regioselective Intramolecular Oxidative α-Functionalization of Tertiary Amines: An Efficient Synthesis of Dihydro-1,3-Oxazines
作者:Mohit L. Deb、Suvendu S. Dey、Isabel Bento、M. Teresa Barros、Christopher D. Maycock
DOI:10.1002/anie.201304654
日期:2013.9.9
Traffic control: The hydroxy functional group directs the α‐functionalization of tertiary amines, synthesizing 1,3‐oxazines by CO bond formation. Reaction occurs with both benzylic and non‐benzylic amines. In the case of naphthoxazine synthesis, 100 % diastereoselectivity was observed. A tentative two‐pathway mechanism is proposed for the reaction.