Insecticidal Evaluation and [4+2] Aza-Diels-Alder Synthesis of 3,7-Diaryl-6,7-dihydro-5<i>H</i>-6-substituted Thiazolo[3,2-a]pyrimidin-5-ones Under Coupled Ultrasonic Irradiation and PTC
作者:Ragini Gupta、Deepti Sharma、P. S. Verma、Anshu Jain
DOI:10.1002/jhet.776
日期:2016.1
A series of 3,7‐diaryl‐6,7‐dihydro‐5H‐6‐substituted‐thiazolo[3,2‐a]pyrimidin‐5‐ones (3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j) were synthesized by the [4+2] cycloaddition reaction of 2‐arylideneamino‐4‐arylthiazoles (2a–j) with in situ generated monosubstituted ketenes underPTC conditions coupled with ultrasonication in good to excellent yields. All the synthesized compounds were characterized on the
一系列3,7-二芳基-6,7-二氢-5 H -6-取代的噻唑并[3,2-a]嘧啶-5-酮(3a,3b,3c,3d,3e,3f,3g,3h,3i,3j)是通过2-芳基亚氨基-4-芳基噻唑(2a–j)与原位的[4 + 2]环加成反应合成的在PTC条件下生成的单取代乙烯酮,再加上超声处理,收率良好。所有合成的化合物均根据其光谱(IR,PMR和质量)和分析数据进行表征。还筛选了合成的化合物对棉铃虫的杀虫活性,其中一些化合物显示出有希望的活性。
[4+2] Diels–Alder Cycloaddition Reaction of 2-benylidineamino-4-phenyl-1,3-thiazoles with Sulfene and their Antifungal Activities
作者:Susanta Kr. Borthakur、Paran Boruah、Birendra N. Goswami
DOI:10.3184/030823407x191877
日期:2007.2
2-Benzylidineamino-4-phenyl-1,3-thiazole undergoes [4+2] Diels–Aldercycloadditionreaction with sulfene resulting in good yield of a mixture of isomeric 2,6-diphenyl-2H,4H-[1,3]thiazolo[3,2-c][1,3,5]thiadiazine 3,3-dioxides and 3, 7-diphenyl[1,3]thiazolo[3,2-b] [1,2,4]thiadiazine 5,5-dioxides derivatives are reported.
Formation of Azomethines from 2-Aminothiazoles and (Heterocyclic) Aromatic Aldehydes
作者:Christopher Hopkinson、George Denis Meakins、Roberts James Purcell
DOI:10.1055/s-1991-26528
日期:——
Reexamination of previous work and new studies show that the reactions of 2-aminothiazoles with (heterocyclic) aromatic aldehydes are not straightforward; there are wide divergencies in behaviour between the various amine-aldehyde pairs. Simple efficient procedures for preparing 2-(alkylideneamino)thiazole derivatives and [bis(thiazol-2-ylamino)methyl]arenes have been developed.
Design of New Cognition Enhancers: From Computer Prediction to Synthesis and Biological Evaluation
作者:Athina A. Geronikaki、John C. Dearden、Dmitrii Filimonov、Irina Galaeva、Taissia L. Garibova、Tatiana Gloriozova、Valentina Krajneva、Alexey Lagunin、Fliur Z. Macaev、Guenadij Molodavkin、Vladimir V. Poroikov、Serghei I. Pogrebnoi、Felix Shepeli、Tatiana A. Voronina、Maria Tsitlakidou、Liudmila Vlad
DOI:10.1021/jm031086k
日期:2004.5.1
To discover new cognition enhancers, a set of virtually designed synthesizable compounds from different chemical series was investigated using two computer-aided approaches. One of the approaches is prediction of biological activity spectra for substances (PASS) and the second is prediction of toxicity, mutagenicity, and carcinogenicity (DEREK). To increase the probability of finding new chemical entities, we investigated a heterogeneous set of highly diverse chemicals including different types of heterocycles: five-membered (thiophenes, thiazoles, imidazoles, oxazoles, pyrroles), six-membered (pyridines, pyrimidines), seven-membered (diazepines, triazepines), fused five+six-membered heterocycles (indoles, benzothiazoles, purines, indolizines, neutral, mesoionic, and cationic azolopyridines). A database including 5494 structures of compounds was created. On the basis of the PASS and DEREK prediction results, eight compounds with the highest probability of cognition-enhancing effect were selected. The cognition-enhancing activity testing showed that all of the selected compounds had a pronounced antiamnesic effect and were found to reduce significantly scopolamine-induced amnesia of passive avoidance reflex (PAR). The action of compounds at doses of 1 and 10 mg/kg caused a statistically significant increase in latent time of reflex and in the number of animals, which did not enter the dark chamber when testing the PAR. Therefore, on the basis of computer prediction, new cognition-enhancing agents were discovered within the chemical series, in which this activity was not known previously.
Bhosale; Chavan; Bhosale, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2012, vol. 51, # 11, p. 1649 - 1654