Vanadium-Catalyzed Oxidative C(CO)–C(CO) Bond Cleavage for C–N Bond Formation: One-Pot Domino Transformation of 1,2-Diketones and Amidines into Imides and Amides
作者:Chander Singh Digwal、Upasana Yadav、P. V. Sri Ramya、Sravani Sana、Baijayantimala Swain、Ahmed Kamal
DOI:10.1021/acs.joc.7b00950
日期:2017.7.21
identified that enables their transformation into imides and amides. The reaction proceeds by dual acylation of amidines via oxidative C(CO)–C(CO) bond cleavage of 1,2-diketones to afford N,N′-diaroyl-N-arylbenzamidine intermediates. In the reaction, these intermediates are easily hydrolyzed into imides and amides through vanadium catalysis. This method provides a practical, simple, and mild synthetic
Copper-Catalyzed Oxidative Diamination of Terminal Alkynes by Amidines: Synthesis of 1,2,4-Trisubstituted Imidazoles
作者:Jihui Li、Luc Neuville
DOI:10.1021/ol400560m
日期:2013.4.5
An efficientcopper-catalyzedsynthesis of 1,2,4-trisubstituted imidazoles using amidines and terminalalkynes has been developed. Overall, the oxidative process, which involves Na2CO3, pyridine, a catalytic amount of CuCl2·2H2O, and oxygen (1 atm), consisted of a regioselective diamination of alkynes allowing the synthesis of diverse imidazoles in modest to good yields.
已经开发了使用am和末端炔烃的铜催化的1,2,4-三取代的咪唑的高效铜催化合成。总体而言,该氧化过程涉及Na 2 CO 3,吡啶,催化量的CuCl 2 ·2H 2 O和氧气(1个大气压),由炔烃的区域选择性加重反应组成,从而可以适度地合成出各种咪唑。产量。
Copper-Catalyzed Intramolecular C–H Amination: A New Entry to Substituted Xanthine Derivatives
involves copper-catalyzed intramolecular C–Hamination of benzamidines that possess a uracil moiety and produces variously substituted xanthines generally in good to high yields. This work introduces a new, facile approach to polysubstituted xanthine compounds. Catalytic synthesis of xanthines was achieved in the presence of a copper catalyst. The process involves copper-catalyzed intramolecular C–H amination