Direct, Late‐Stage Mono‐
<i>N</i>
‐arylation of Pentamidine: Method Development, Mechanistic Insight, and Expedient Access to Novel Antiparastitics against Diamidine‐Resistant Parasites
作者:Jack Robertson、Marzuq A. Ungogo、Mustafa M. Aldfer、Leandro Lemgruber、Fergus S. McWhinnie、Bela E. Bode、Katherine L. Jones、Allan J. B. Watson、Harry P. Koning、Glenn A. Burley
DOI:10.1002/cmdc.202100509
日期:2021.11.19
Accessing antiparasitic amidines: A selective mono-N-arylation strategy of amidines under Chan-Lam conditions was used to access the first mono-N-arylated analogues of pentamidine. Sub-micromolar activity against kinetoplastid parasites was observed for several analogues with no cross-resistance in pentamidine and diminazene-resistant trypanosome strains and against Leishmania mexicana. This work highlights
A straightforward method to synthesize imidazole derivatives from amidines and sulfoxonium ylides catalyzed by acids is reported in this study. Specifically, catalyzed by trifluoroacetic acid in DCE solvents can improve synthesis efficiency under metal-free conditions. A series of imidazole scaffolds were produced in good to excellent yields.
Transition‐Metal‐Free Synthesis of 1,2‐diphenyl‐1
<i>H</i>
‐benzo[
<i>d</i>
] Imidazole Derivatives from
<i>N</i>
‐phenylbenzimidamides and Cyclohexanones
A transition‐metal‐free strategy for the formation of 1,2‐diphenyl‐1H‐benzo[d] imidazoles from N‐phenylbenzimidamides and cyclohexanones is introduced. This is the first report on the direct synthesis of 1,2‐diphenyl‐1H‐benzo[d] imidazoles from cyclohexanones and N‐phenylbenzimidamides via iodine‐ promoted oxidative cyclization. Non‐aromatic cyclohexanones were smoothly dehydrogenated, and acted as
引入了一种无过渡金属的策略,用于由N-苯基苯甲酰胺和环己酮形成1,2-二苯基-1 H-苯并[ d ]咪唑。这是关于通过碘促进的氧化环化反应,由环己酮和N-苯基苯甲酰胺直接合成1,2-二苯基-1 H-苯并[ d ]咪唑的第一份报告。非芳族环己酮可顺利脱氢,并使用氧气作为绿色氧化剂充当芳基源。碘的催化使用使得该方法相当简单,更经济和方便。在优化条件下,各种取代的1,2-二苯基-1 H-苯并[ d使咪唑平稳反应,并以中等至优异的产率生成所需的取代的咪唑。
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。
Lewis acid-catalyzed 2-arylquinazoline formation from N′-arylbenzimidamides and paraformaldehyde
作者:Xiufang Cheng、Huamin Wang、Fuhong Xiao、Guo-Jun Deng
DOI:10.1039/c6gc02319c
日期:——
An efficient procedure for the synthesis of 2-arylquinazolines from N'-arylbenzimidamides has been developed under transition-metal-free conditions. In this process, stable and low toxicity paraformaldehyde was used as the carbon source....