Synthesis and Insecticidal Activity of Some New 3‐[4(3
H
)‐Quinazolinone‐2‐(yl)thiomethyl]‐1,2,4‐ triazole‐5‐thiols
摘要:
A series of 14 new 3-[4(3H)-quinazolinone-2-yl)thiomethyl]1,2,4-triazoles were prepared and characterized by elemental analyses, IR, [H-1] NMR and mass spectral data. Four of the compounds showed insecticidal activity equivalent to that of malathion against the adult stage of the blow fly (Chrysomyia albiceps). However, their activity against the larval stages of this insect species was considerably weaker.
Application of Deep Eutectic Solvents in the Synthesis of Substituted 2-Mercaptoquinazolin-4(3H)-Ones: A Comparison of Selected Green Chemistry Methods
In this study, deepeutecticsolvents (DESs) were used as green and eco-friendly media for the synthesis of substituted 2-mercaptoquinazolin-4(3H)-ones from different anthranilic acids and aliphatic or aromatic isothiocyanates. A model reaction on anthranilic acid and phenyl isothiocyanate was performed in 20 choline chloride-based DESs at 80 °C to find the best solvent. Based on the product yield
在这项研究中,低共熔溶剂(DES)被用作绿色环保介质,从不同的邻氨基苯甲酸和脂肪族或芳香族异硫氰酸酯合成取代的2-巯基喹唑啉-4(3H)-酮。在 80 °C 下,在 20 个基于氯化胆碱的 DES 中进行了邻氨基苯甲酸和异硫氰酸苯酯的模型反应,以找到最佳溶剂。根据产物收率,发现氯化胆碱:尿素 (1:2) DES 是最有效的,而 DES 既充当溶剂又充当催化剂。使用搅拌、微波辅助和超声辅助合成以中等至良好的产率制备所需的化合物。值得注意的是,混合和超声处理获得了更高的产率(16-76%),而微波诱导合成的效率较低(13-49%)。这项研究的具体贡献是使用DES与上述绿色技术相结合来合成各种衍生物。合成的化合物的结构通过1H和13C NMR光谱证实。
Chaurasia, M. R.; Sharma, Surendra K., Heterocycles, 1981, vol. 16, # 4, p. 621 - 629
作者:Chaurasia, M. R.、Sharma, Surendra K.
DOI:——
日期:——
Lakhan; Singh; Singh, Journal of the Indian Chemical Society, 1987, vol. 64, # 5, p. 316 - 318
作者:Lakhan、Singh、Singh
DOI:——
日期:——
New general synthesis of benzo[4,5]imidazo[1,2-a]pyrimidine and benzo[4,5]imidazo[2,1-b]quinazoline derivatives
作者:A. A. Harutyunyan
DOI:10.1134/s1070428016070150
日期:2016.7
The reactions of benzene-1,2-diamine with 5-substituted 2-(alkylsulfanyl)-4-methylpyrimidin-6(1H)-ones and 2-(propylsulfanyl)- and 5-iodo-2-(propylsulfanyl)-3,4-dihydroquinazolines at 175-185A degrees C under solvent-free conditions unexpectedly afforded benzo[4,5]imidazo[1,2-a]pyrimidine, benzo[4,5]imidazo[2,1-b]-quinazoline, and 2,2'-(benzene-1,2-diyldiimino)bis[pyrimidin-4(3H)-ones]. The described reaction is the first example of synthesis of these heterocyclic systems by fusion of benzimidazole to pyrimidine or quinazoline and is likely to follow ANRORC mechanism.
CHAURASIA M. R.; SHARMA S. K., HETEROCYCLES. 1981, 16, NO 4, 621-629