用 CO 2对炔烃进行双官能团羧化是一种可持续且重要的策略,可以从两种现成的起始材料中生成有价值的丙烯酸酯衍生物。然而,此类协议总是会使用过量的金属试剂和过渡金属残留物。在此,我们报道了炔烃与苯硫酚和 CO 2的第一次硫代羧化反应,这是一个可见光驱动且无过渡金属的过程。与之前通过CO 2的双电子活化对炔烃进行羧化反应相比,机理和计算研究表明 CO 2的单电子活化参与硫代羧化,呈现独特的β-羧化。随后的环化酰化有效地提供了重要的硫色酮。此外,一锅法具有温和的反应条件(室温,1 个大气压的 CO 2)、高化学和区域选择性、易于扩展和易于将产物衍生为生物活性化合物。
Organylzinc Chalcogenolate Promoted Michael-Type Addition of α,β-Unsaturated Carbonyl Compounds
作者:Vanessa Lóren Nunes、Ingryd Cristina de Oliveira、Olga Soares do Rêgo Barros
DOI:10.1002/ejoc.201301497
日期:2014.3
chalcogenide compounds promoted by organylzinc chalcogenolates. In this protocol, reductive cleavage of diorganyl dichalcogenide bonds by the Zn/NH4OH system led to organylzinc chalcogenolates. The reaction was performed with propiolic acids and esters and afforded β-organochalcogenacrylic acids and esters under mild basic conditions. The stereochemistry corresponded to anti-Markovnikov addition of the organyl
Inhibition of herpes proteases and antiviral activity of 2-substituted thieno[2,3-d]oxazinones
作者:Richard L. Jarvest、Ivan L. Pinto、Stephen M. Ashman、Christine E. Dabrowski、Annabellee V. Fernandez、L.John Jennings、Patrick Lavery、David G. Tew
DOI:10.1016/s0960-894x(99)00004-9
日期:1999.2
Cinnamyl derivatives of thieno[2,3-d]oxazinones are mechanism-based inhibitors of the HSV-2, VZV and CMV herpes proteases which demonstrate nanomolar potency. Compounds 5 and 28 inhibit protease processing in HSV-2 infected cells with a selectivity index of at least 30. (C) 1999 Elsevier Science Ltd. Ail rights reserved.
Cyclization of 3-(arylchalcogeno)propenoyl chlorides. 2. Chalcogen and substituent control in the regiochemistry of intramolecular acylation. Preparation of benzo[b]telluropyrones