α-Vinylation of amides with arylacetylenes: synthesis of allylamines under metal-free conditions
作者:Manman Sun、Huandong Wu、Weiliang Bao
DOI:10.1039/c3ob41450g
日期:——
A novel methodology for the α-vinylation of amides with arylacetylenes under metal-free conditions has been introduced. This methodology provides a new protocol to synthesize allylamines. In each product, the amount of the cis-isomer was more than that of the trans-isomer.
Radical C(sp<sup>3</sup>)–H alkenylation, alkynylation and allylation of ethers and amides enabled by photocatalysis
作者:Subhasis Paul、Joyram Guin
DOI:10.1039/c7gc00840f
日期:——
enables selective incorporation of alkenyl, alkynyl and allyl functional groups into the C(sp3)–H bond under green reaction conditions is developed. The process is based on the catalytic formation of α-alkoxyl/α-amidyl radicals via the homolytic activation of the C(sp3)–H bond of ethers/amides with a catalytic amount of diarylketone in the presence of a household fluorescent light bulb. This simple reaction
Regioselective Intramolecular Allene Amidation Enabled by an EDA Complex**
作者:Lu Liu、Robert M. Ward、Jennifer M. Schomaker
DOI:10.1002/chem.202002533
日期:2020.11.2
The addition of radicals to unsaturated precursors is a powerful tool for the synthesis of both carbo‐ and heterocyclic organic building blocks. The recent advent of mild ways to generate N‐centered radicals has reignited interest in exploiting highly regio‐, chemo‐, and stereoselective transformations that employ these reactive intermediates. While the additions of aminyl, iminyl, and amidyl radicals
Transition Metal-Free Oxidative Cross-Coupling Reaction of Activated Olefins with <i>N</i>-Alkyl Amides
作者:Miaomiao Li、Lei Zheng、Li Ma、Yunfeng Chen
DOI:10.1021/acs.joc.0c02837
日期:2021.3.5
The K2S2O8-mediated transition metal-free oxidative cross-coupling reaction of activatedolefins with N-alkyl amides was developed, and the reaction gave N-allylic amides in moderate to good yield. This reaction protocol was suitable for different kinds of activatedolefins.
进行了K 2 S 2 O 8介导的活化烯烃与N-烷基酰胺的无过渡金属氧化交叉偶联反应,该反应以中等至良好的收率得到了N-烯丙基酰胺。该反应方案适用于不同种类的活化烯烃。
Photoinduced Pd-Catalyzed C<sub>sp2</sub>–H/C<sub>sp3</sub>–H Dehydrocoupling Reaction Employing Polyhaloaromatics as the Dehydrogenating Agent
作者:Lin Chen、Kai Jiang、Guohui Zeng、Biaolin Yin
DOI:10.1021/acs.orglett.2c03708
日期:2022.12.16
strategy for intermolecular cross-dehydrocoupling of Csp2–H bonds and Csp3–H bonds has been developed with the aid of photoinduced Pd catalysis. Polyhalogenated arenes can be used as the efficient dehydrogenating agent, which enables multifold transfer of carbon radical to avoid the production of stoichiometric or excess wasted arenes. In this strategy, substituted styrenes and N-arylacrylamides with simple
在光诱导 Pd 催化的帮助下,已经开发了一种用于 C sp2 -H 键和 C sp3 -H 键的分子间交叉脱氢偶联的温和策略。多卤代芳烃可用作有效的脱氢剂,它可以实现碳自由基的多重转移,以避免产生化学计量或过量的废芳烃。在该策略中,取代的苯乙烯和N-芳基丙烯酰胺与简单的醚或酰胺作为偶联伙伴,以中等到良好的产率得到相应的内部烯烃和苯并内酰胺。