Design and green synthesis of 2-(diarylalkyl)aminobenzothiazole derivatives and their dual activities as angiotensin converting enzyme inhibitors and calcium channel blockers
作者:Praveen Kumar Kalavagunta、Pankaj K. Bagul、Anvesh Jallapally、Srinivas Kantevari、Sanjay K. Banerjee、Narender Ravirala
DOI:10.1016/j.ejmech.2014.06.035
日期:2014.8
2-(diarylalkyl)aminobenzothiazoles were designed based on commercial synthetic calcium channel blockers (CCBs) and angiotensinconvertingenzyme (ACE) inhibitors. Which are further modified based on the natural products which are angiotensinconvertingenzyme (ACE) inhibitors. Completely green protocol was developed for their synthesis. As they are initially designed based on CCBs, they were screened for
Fe<sub>3</sub>
O<sub>4</sub>
@SiO<sub>2</sub>
-ZrCl<sub>2</sub>
-MNPs: A novel magnetic catalyst for the clean and efficient cascade synthesis of 1-(benzothiazolylamino)methyl-2-naphthol derivatives in the absence of solvent
作者:Fatemeh Kamali、Farhad Shirini
DOI:10.1002/aoc.3972
日期:2018.1
A green, simple and eco‐friendly three‐component condensation for the synthesis of 1‐(benzothiazolylamino)methyl‐2‐naphthols using new magnetic nanoparticles formulated as Fe3O4@SiO2–ZrCl2‐MNPs is described. Considering the economic and environmental aspects, the method provides some advantages such as clean procedure, solvent‐free conditions, simple operation and work‐up, relatively short reaction
描述了一种绿色,简单且环保的三组分缩合反应,该反应使用新的磁性纳米颗粒Fe 3 O 4 @SiO 2 -ZrCl 2 -MNPs合成1-(苯并噻唑基氨基)甲基-2-萘酚。考虑到经济和环境方面,该方法具有一些优点,例如清洁程序,无溶剂条件,简单的操作和后处理,相对较短的反应时间和较高的产物收率。此外,使用外部磁体可以很容易地将引入的催化剂回收至多达4个连续运行,并且具有一致的活性。
Identification of Naphthol Derivatives as Novel Antifeedants and Insecticides. 1
A series of beta-naphthol-derived 2-aminobenzothiazolomethylnaphthol derivatives (4a-4q) were synthesized and purified in excellent yields (86-94%) using green protocols and screened for their antifeedant and toxic activities against tobacco caterpillar (Spodoptera litura) and castor semilooper (Achaea janata) using no-choice leaf disk and topical bioassay methods. Four of them, 4d, 4f, 4i, and 4j, were identified to be potent antifeedants with ED50 values of 16.4, 19.3, 7.0, and 5.2 mu g/cm(2) against S. litura and 13.9, 17.2, 10.2, and 7.7 mu g/cm(2) against A. janata, respectively, and the mortality rate is >95% for 4i and 4j in the case of S. litura and 4j in case of A. janata at a dosage of 0.2 mu g/insect. Compounds 4d, 4i, and 4m are moderately toxic to A. janata only. Overall, this study identified a novel class of synthetic compounds that do not belong to organochlorides, organophosphates, carbamates, or neonicotinoids as strong antifeedants as well as insecticides.
NaHSO<sub>4</sub>.H<sub>2</sub>O Catalyzed Multicomponent Synthesis of 1-(Benzothiazolylamino) Methyl-2-Naphthols Under Solvent-Free Conditions
作者:Asghar Hosseinian、Hamid Reza Shaterian
DOI:10.1080/10426507.2012.664221
日期:2012.9.1
A one-pot, efficient three-component condensation of aldehydes, 2-naphthol, and 2-aminobenzothiazole in the presence of sodium hydrogen sulfate as an effective catalyst for the synthesis of 1-(benzothiazolylamino)methyl-2-naphthol derivatives under thermal and solvent-free conditions is described. These products involve two biologically active parts, Betti's base and benzothiazole. The present methodology offers several advantages, such as good yields, short reaction times, and easy work-up.
Shaterian; Mohammadnia, South African Journal of Chemistry, 2013, vol. 66, p. 60 - 63