摘要描述了杂环胺与异硫氰酸苯酯或甲基异硫氰酸酯或 CS2 合成杂环硫脲。报告了七种新的 X 射线晶体结构:在 N-(3-吡啶基)-N'-苯基硫脲 (Pna21, a = 10.1453(3), b = 17.6183(5), c = 6.4787(2), V = 1158.02) (6), Z = 4) 氢键导致形成由螺旋组成的 3D 网络,螺旋形成平行于 c 轴的通道。在 N-(4-吡啶基)-N'-苯基硫脲 (P21/c, a = 16.9314(3), b = 10.3554(2), c = 13.5152(3), β = 106.5080(10), V = 2271.96( 8), Z = 4, 两个独立的分子) 氢键导致 N–H…S 桥接二聚体和 N–H…Py 链,形成二维片状网络。在 N-(2-嘧啶基)-N'-苯基硫脲 (P21/c, a = 5.45900(10), b = 13
Synthesis and in vitro urease inhibitory activity of N,N′-disubstituted thioureas
作者:Khalid Mohammed Khan、Farzana Naz、Muhammad Taha、Ajmal Khan、Shahnaz Perveen、M.I. Choudhary、Wolfgang Voelter
DOI:10.1016/j.ejmech.2014.01.001
日期:2014.3
Thiourea derivatives (1–38) were synthesized and evaluated for their urease inhibition potential. The synthetic compounds showed a varying degree of in vitro urease inhibition with IC50 values 5.53 ± 0.02–91.50 ± 0.08 μM, most of which are superior to the standard thiourea (IC50 = 21.00 ± 0.11 μM). In order to ensure the mode of inhibition of these compounds, the kinetic study of the most active compounds
作者:L. W. Deady、D. Ganame、N. H. Quazi、S. D. Zanatta
DOI:10.1071/ch02050
日期:——
The reaction of N-(pyridin-3-yl) and -4-yl thiourea derivatives with malonyl dichloride in trifluoroacetic acid is shown to be an efficient synthesis of the corresponding thiobarbituric acids. The pyridin-2-yl analogue cleaved and produced, instead, 2-hydroxy-4H-pyrido[1,2a]pyrimidin-4-one.
Microwave-Assisted Synthesis of <i>N</i>,<i>N</i><i>‘</i>-Diaryl Cyanoguanidines
作者:Sean K. Hamilton、Doug E. Wilkinson、Gregory S. Hamilton、Yong-Qian Wu
DOI:10.1021/ol050728q
日期:2005.6.1
[reaction: see text] A mild, efficient, and high-yielding method for the synthesis of N,N'-diaryl cyanoguanidines from their corresponding thioureas under microwave-assisted conditions is described. A series of cyanoguanidines were synthesized containing both electron-donating and electron-withdrawing substituents. The reactions were facilitated by the use of polar solvents along with moderate temperatures
A series of phenylguanidine base compounds and their pharmaceutically acceptable acid addition salts have been found to be active as oral hypoglycemic agents. Preferred member compounds include N,N'-diphenyl-1-pyrrolidinocarboxamidine, N-phenyl-N'-methyl-N'-phenyl-1-pyrrolidinocarboxamidine and N-phenyl-N'-(p-chlorophenyl)-1-pyrrolidinocarboxamidine, and their hydrohalide acid addition salts. Synthetic routes leading to these compounds are described.
2-Chloro-1,3-dimethylimidazolinium Chloride. 1. A Powerful Dehydrating Equivalent to DCC
作者:Toshio Isobe、Tsutomu Ishikawa
DOI:10.1021/jo990210y
日期:1999.9.1
2-Chloro-1,3-dimethylimidazolinium chloride (DMC) (3) can act as a powerful dehydrating agent, replacing DCC (1) under nearly neutral conditions. Its application to acylation and dehydration is described.