functionalization is a challenging but powerful tool in organic synthesis. Polarity-matched and sterically controlled hydrogen atom transfer (HAT) provides an excellent opportunity for site-selective functionalization. As such, the dual Ni/photoredox system was successfully employed to generate acyl radicals from aldehydes via selective formyl C–H activation and subsequently cross-coupled to generate ketones, a ubiquitous
H<sub>2</sub>O<sub>2</sub>-mediated room temperature synthesis of 2-arylacetophenones from arylhydrazines and vinyl azides in water
作者:Mengqiang Luo、Yaohong Zhang、Ping Fang、Yan Li、Chenze Qi、Yong Li、Runpu Shen、Kai Cheng、Hai Wang
DOI:10.1039/d1ob02023d
日期:——
practical methodology for the roomtemperaturesynthesis of 2-arylacetophenones in water has been discovered. The facile and efficient transformation involves the oxidative radical addition of arylhydrazines with α-aryl vinyl azides in the presence of H2O2 (as a radical initiator) and PEG-800 (as a phase-transfer catalyst). From the viewpoint of green chemistry and organic synthesis, the present protocol is
已经发现了一种用于在水中室温合成 2-芳基苯乙酮的环境友好、经济高效且实用的方法。简便有效的转化涉及芳基肼与 α-芳基乙烯基叠氮化物在 H 2 O 2(作为自由基引发剂)和 PEG-800(作为相转移催化剂)存在下的氧化自由基加成。从绿色化学和有机合成的角度来看,本协议具有重要意义,因为它使用了廉价、无毒且易于获得的起始材料和试剂,并且易于进行克级合成,这为获取 2 提供了有吸引力的策略-芳基苯乙酮。
Weisl, Monatshefte fur Chemie, 1905, vol. 26, p. 984
作者:Weisl
DOI:——
日期:——
Non-peptidic inhibitors of human neutrophil elastase: The design and synthesis of sulfonanilide-containing inhibitors
A novel series of pivaloyloxy benzene derivatives has been identified as potent and selective human neutrophil elastase (HNE) inhibitors. Convergent syntheses were developed in order to identify the inhibitors which are intravenously effective in an animal model. A compound of particular interest is the sulfonanilide-containing analogues. Structure-activity relationships are discussed. Structural requirements