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
Silver-catalyzed [3 + 2] domino reaction: an efficient strategy to synthesize imidazole-5-carbaldehydes
作者:Changcheng Wang、Hangqi Jiang、Weifeng Chen、Jun Dong、Zhengwang Chen、Hua Cao
DOI:10.1039/c7ob01242j
日期:——
An unprecedented regioselective silver-catalyzed [3 + 2] domino reaction of amidines and ynals for the formation of C–N bonds has been developed. The reaction provided a new route to prepare imidazole-5-carbaldehydes which are important intermediates for the construction of fine chemicals. The reaction proceeds smoothly with a broad range of substrates to give imidazoles in good yields.
Controllable Site-Selective Construction of 4- and 5-Hydroxyalkyl-Substituted Imidazoles from Amidines, Ynals, and Water
作者:Wei Liu、Jiaming He、Xiang Liu、Yue Yu、Yongyan Pei、Baofu Zhu、Hua Cao
DOI:10.1021/acs.joc.0c01715
日期:2020.12.4
site-selective pathways to construct 4- and 5-hydroxyalkyl-substituted imidazoles through a three-component reaction of amidines, ynals, and water has been documented. Particularly, the high regioselectivity of the reaction was simply switched by changing the additives. In addition, further 18O-labeled experiments to probe a plausible mechanism and the gram-scale synthesis were studied.