虽然在室温下使用葡萄糖进行过硫酸盐活化主要集中在硫酸根阴离子的动力学研究上,但很少证明该协议在有机合成中的应用。我们重新研究了选定的 K 2 S 2 O 8介导的已知有机反应,这些反应总是需要更高的温度和有机溶剂。据报道,在室温下,使用廉价的氧化剂 K 2 S 2 O 8在水中对杂环进行了多样化、温和的功能化和合成,证明了该方法的可持续性和广泛的范围。与用于过硫酸盐活化的传统方法不同,当前方法使用天然丰富的葡萄糖作为 K 2S 2 O 8活化剂,避免使用高温、紫外线、过渡金属或碱。
Synthesis and electronic absorption and fluorescence of 2-arylbenzothiazole derivatives
作者:Lianqing Chen、Chuluo Yang、Suyue Li、Jingui Qin
DOI:10.1016/j.saa.2006.11.038
日期:2007.10
routes. These compounds have been fully characterized by EA, IR, NMR and MS. The electronicabsorption and fluorescence of these compounds have been systematically investigated for the first time. The relationships between their photophysical properties and structures have been discussed. The alteration of absorption and emission wavelengths can be elucidated by Hammett's substituent constants.
Antidiabetic potential and enzyme kinetics of benzothiazole derivatives and their non-bonded interactions with α-glucosidase and α-amylase
作者:Ninad V. Puranik、Hemalata M. Puntambekar、Pratibha Srivastava
DOI:10.1007/s00044-016-1520-3
日期:2016.4
Benzothiazole derivatives were synthesized and their antidiabeticpotential evaluated using α-glucosidase, α-amylase, non-enzymatic glycosylation of hemoglobin and advanced glycation end product inhibition assays. Compound 3l showed low IC50 values of 0.31, 0.98, 0.59 and 0.19 mM in α-amylase, α-glucosidase, non-enzymatic glycosylation of hemoglobin and AGE inhibition assays, respectively, and outperformed
N-Substituted Formamides as C1-Sources for the Synthesis of Benzimidazole and Benzothiazole Derivatives by Using Zinc Catalysts
作者:Bhalchandra Bhanage、Deepak Nale
DOI:10.1055/s-0035-1560319
日期:——
An efficient and convenient one-pot protocol has been developed for the synthesis of a variety of benzimidazole, benzoxazole, and benzothiazole derivatives. This novel approach uses various o-phenylenediamines and N-substituted formamides (C1 sources) in a zinc-catalyzed cyclization in the presence of poly(methylhydrosiloxane) to afford the corresponding derivatives as sole products in moderate to
Elemental sulfur mediated cyclization via redox strategy: Synthesis of benzothiazoles from o -chloronitrobenzenes and benzyl chlorides
作者:Xin Wang、Dazhuang Miao、Xiaotong Li、Renhe Hu、Zhao Yang、Ren Gu、Shiqing Han
DOI:10.1016/j.tet.2017.07.013
日期:2017.8
A novel metal-free synthesis of 2-substituted benzothiazoles from easily available o-chloronitrobenzenes and benzyl chlorides using elementalsulfur as traceless oxidizing agent has been developed. The protocol provides a simple, efficient, and atom-economic way to access to benzothiazoles in moderate to excellent yields. And the approach exhibited good functional group tolerance.
Aerobic oxidative synthesis of quinazolinones and benzothiazoles in the presence of laccase/DDQ as a bioinspired cooperative catalytic system under mild conditions
study applied laccase/DDQ as a bioinspired cooperative catalyticsystem for the synthesis of quinazolinones (80–95% yield) and benzothiazoles (65–98% yield) using air or O2 as ideal oxidants in aqueous media at ambient temperature. The aerobicoxidative cyclization reactions occur in two steps: (i) chemical cyclization; (ii) chemoenzymatic oxidation. These methods are more environment-friendly, efficient
目前的研究将漆酶/DDQ 作为一种受生物启发的协同催化系统,在环境温度下使用空气或 O 2作为水介质中的理想氧化剂合成喹唑啉酮(80-95% 产率)和苯并噻唑(65-98% 产率)。好氧氧化环化反应分两个步骤进行: (i) 化学环化;(ii) 化学酶氧化。由于使用O 2作为氧化剂,漆酶作为生态友好的生物催化剂,水性介质作为溶剂,并且不含任何有毒的过渡金属和卤化物,这些方法比其他报道的方法更环保、高效、简单和实用。催化剂。因此,这些方法可以应用于制药和其他敏感的合成过程。