Intramolecular palladium-catalyzed aryl amination and aryl amidation
作者:John P. Wolfe、Roger A. Rennels、Stephen L. Buchwald
DOI:10.1016/0040-4020(96)00266-9
日期:1996.5
treatment with a palladium catalyst and a suitable base, aromatic halides undergo intramolecular substitution to form five, six, and seven-membered rings. In a similar fashion aryl halides with pendant amides or sulfonamides are cyclized to form five and six-membered rings.
Anodic Cyanation ofN-Substituted 1-Benzazepines: Synthesis of the Corresponding α-Aminonitriles
作者:Sébastien Michel、Erwan Le Gall、Jean-Pierre Hurvois、Claude Moinet、André Tallec、Philippe Uriac、Loic Toupet
DOI:10.1002/jlac.199719970137
日期:1997.1
α-Cyano-N-alkyl-1-benzazepines are obtained by electrochemical oxidation of various 1-benzazepines. Electrolyses are carried out in a flow cell, at a carbon felt anode in methanol; the supporting electrolyte is a mixture of lithium acetate and sodium cyanide. With 2,3,4,5-tetrahydrobenzazepines 2a–c and 5a–b, cyanation takes place either on the sidechain or on the seven-membered ring; with the latter
Regio- and chemoselective Csp<sup>3</sup>–H arylation of benzylamines by single electron transfer/hydrogen atom transfer synergistic catalysis
作者:Takafumi Ide、Joshua P. Barham、Masashi Fujita、Yuji Kawato、Hiromichi Egami、Yoshitaka Hamashima
DOI:10.1039/c8sc02965b
日期:——
indicated that the conjugate base of PhC(O)SH is oxidized in preference to the substrate amine. The discovery of the thiocarboxylate as a novel HAT catalyst allowed for the selective generation of the sulfur-centered radical, so that the N-benzyl selectivity was achieved by overriding the inherent N-methyl and/or N-methylene selectivity under SET catalysis conditions. While visible light-driven α-C–H
我们提出了通过单电子转移(SET)和氢原子转移(HAT)催化的协同作用介导的苄胺的高度区域和化学选择性Csp 3 -H芳基化。仅在先例的 SET 催化下, N , N-二甲基苄胺的芳基化反应通过铵自由基阳离子的形成进行,并选择性地靶向N-甲基。相比之下,添加PhC(O)SH作为HAT催化剂前体将区域选择性完全转变为N-苄基位置处的Csp 3 –H芳基化。氧化电位的测量表明,PhC(O)SH 的共轭碱优先于底物胺被氧化。硫代羧酸酯作为新型 HAT 催化剂的发现允许选择性生成以硫为中心的自由基,从而通过在 SET 催化条件下超越固有的N-甲基和/或N-亚甲基选择性来实现N-苄基选择性。虽然可见光驱动的胺 α-C-H 官能化主要是用苯胺衍生物和四氢异喹啉 (THIQ) 来证明的,但我们的方法适用于各种伯、仲和叔苄胺,以实现有效的N-苄基 C-H 芳基化。官能团耐受性高,各种 1,1-二芳基甲胺(包括
Efficient Nickel-Mediated Intramolecular Amination of Aryl Chlorides
作者:Rafik Omar-Amrani、Antoine Thomas、Eric Brenner、Raphaël Schneider、Yves Fort
DOI:10.1021/ol034659w
日期:2003.6.1
[GRAPHICS]The use of an in situ generated Ni(0) catalyst associated with 2,2'-bipyridine or N,N'-bis(2,6-diisopropylphenyl)dihydroimidazol-2-ylidene (SIPr) as a ligand and NaO-t-Bu as the base for the intramolecular coupling of aryl chlorides with amines is described. The procedure has been applied to the formation of five-, six-, and seven-membered rings.
Guram, Anil S.; Rennels, Roger A.; Buchwald, Stephen L., Angewandte Chemie, 1995, vol. 107, # 12, p. 1456 - 1459
作者:Guram, Anil S.、Rennels, Roger A.、Buchwald, Stephen L.