我们报告了一种新的电化学无负载电解质方法,用于通过草酸氧化合成尿素、氨基甲酸酯和硫代氨基甲酸酯。这种简单、实用且无光气的路线包括在有机碱存在下通过草酸的阳极脱羧原位生成异氰酸酯中间体,然后一锅加入合适的亲核试剂以提供相应的尿素,氨基甲酸酯和硫代氨基甲酸酯。此程序适用于不同的胺、醇和硫醇。此外,当使用单程连续电化学流动条件并且该反应在碳石墨 C gr /C gr 在流动池中,可以在 6 分钟的停留时间内以高产率获得尿素化合物,解锁在批量条件下无法访问的底物,同时易于扩展。
The generation of carbamoyl radicals, followed by their addition to heteroarenes, was performed under mild conditions through a metal-free photocatalyzed decarboxylation of oxamic acids. The process has been applied to the carbamoylation of heteroaromatic bases using α-aminoacid-derived oxamic acids, leading to the corresponding amides without racemization.
Direct C−H Carbamoylation of Nitrogen-Containing Heterocycles
作者:Matthieu Jouffroy、Jongrock Kong
DOI:10.1002/chem.201806159
日期:2019.2.11
additions at innately electrophilic C(sp2) centers are perfectly suited for the direct functionalization of heterocycles. Using bench stable and commercially available alkyl oxamate and oxamic acid derivatives in combination with photoredox catalysis, a direct carbamoylation of heterocycles yielding amide functionalized pharmacophores in a single step is reported. The reaction conditions reported are
palladium-catalyzed nondirected fluorinated olefination was developed. The oxalyl amide ligand greatly improved the yield of the reaction. A wide variety of isatin derivatives were well tolerated and yielded the corresponding products in moderate to good yields. Various fluorinatedolefins were also compatible. The application and synthesis of bioactive compounds such as a Metisazone derivative highlight the synthetic
Synthesis and nootropic activity of oxamoylamino acids
作者:G. P. Petyunin、A. S. Zaks、V. N. Petyunina、Zh. V. Dmitrievskaya、T. A. Kapitonenko
DOI:10.1007/bf00773611
日期:1988.11
Structure–activity relationships of substituted oxyoxalamides as inhibitors of the human soluble epoxide hydrolase
作者:In-Hae Kim、In-Hee Lee、Hisashi Nishiwaki、Bruce D. Hammock、Kosuke Nishi
DOI:10.1016/j.bmc.2013.12.027
日期:2014.2
We explored both structure-activity relationships among substituted oxyoxalamides used as the primary pharmacophore of inhibitors of the human sEH and as a secondary pharmacophore to improve water solubility of inhibitors. When the oxyoxalamide function was modified with a variety of alkyls or substituted alkyls, compound 6 with a 2-adamantyl group and a benzyl group was found to be a potent sEH inhibitor, suggesting that the substituted oxyoxalamide function is a promising primary pharmacophore for the human sEH, and compound 6 can be a novel lead structure for the development of further improved oxyoxalamide or other related derivatives. In addition, introduction of substituted oxyoxalamide to inhibitors with an amide or urea primary pharmacophore produced significant improvements in inhibition potency and water solubility. In particular, the N,N,O-trimethyloxyoxalamide group in amide or urea inhibitors (26 and 31) was most effective among those tested for both inhibition and solubility. The results indicate that substituted oxyoxalamide function incorporated into amide or urea inhibitors is a useful secondary pharmacophore, and the resulting structures will be an important basis for the development of bioavailable sEH inhibitors. (C) 2013 Elsevier Ltd. All rights reserved.