Carbopalladation of Nitriles: Synthesis of 3,4-Disubstituted 2-Aminonaphthalenes and 1,3-Benzoxazine Derivatives by the Palladium-Catalyzed Annulation of Alkynes by (2-Iodophenyl)acetonitrile
作者:Qingping Tian、Alexandre A. Pletnev、Richard C. Larock
DOI:10.1021/jo026229+
日期:2003.1.1
studied. The annulation of certain hindered propargylic alcohols affords 1,3-benzoxazinederivatives, rather than the expected 2-aminonaphthalenes. The involvement of trialkylamine bases in the formation of these heterocyclic compounds has been established. A proposed mechanism for the synthesis of 1,3-benzoxazinederivatives involves the formation of the expected 2-amino-3-(1-hydroxyalkyl)naphthalenes
sequential borane‐mediated C(sp2)−H borylation and intramolecular N‐demethylation. The conveniently in situ generated Piers’ borane from a borinic acid reacts with a series of N,N‐dimethyl‐1,1′‐biphenyl‐2‐amines in the presence of PhSiH3 to afford six‐membered amine‐borane adducts bearing a C(sp2)−B bond at the C2′‐position. These species undergo an intramolecular N‐demethylation with a B(C6F5)3 catalyst to
本文描述了通过连续的硼烷介导的C(sp 2)-H硼化和分子内N-去甲基化从1,1'-联苯胺获得BN-多芳族化合物的空前途径。在PhSiH 3存在下,由硼酸方便地就地生成的Piers'硼烷与一系列N,N-二甲基-1,1'-联苯-2-胺反应,得到六元胺-硼烷加合物在C2'位置的C(sp 2)-B键。这些物种通过B(C 6 F 5)3进行分子内N-去甲基化提供多芳族化合物的BN-等排体的催化剂。根据计算研究,提出了逐步的离子途径。所产生的BN-杂芳烃的光物理特征表明它们与全碳类似物具有显着差异。
Palladium-catalyzed annulation of internal alkynes in aqueous medium
作者:Wei Jie Ang、Chih-Hsuan Tai、Lee-Chiang Lo、Yulin Lam
DOI:10.1039/c3ra46010j
日期:——
To facilitate precatalyst recovery and reuse, we have developed a fluorous, oxime-based palladacycle 1 and demonstrated that it is a very efficient and versatile precatalyst for carbo- and heteroannulation of internal alkynes with functionalized aryl halides in aqueous medium. A uniform reaction condition for these annulation reactions was also developed.
Synthesis of <i>ortho</i>-Diamino-Functionalized 1-Arylnaphthalenes through Nickel-Catalyzed Cyclization of Ynamide-Benzylnitriles with Organoboronic Acids
作者:Xiaoping Hu、Peizhuo Lv、Ninghui Zhang、Yuanhong Liu
DOI:10.1021/acs.orglett.1c02957
日期:2021.10.15
Carbocycle Synthesis via Carbopalladation of Nitriles
作者:Richard C. Larock、Qingping Tian、Alexandre A. Pletnev