Iron(III)-catalyzed regioselective direct remote C–H carboxylation of naphthyl and quinoline amides was developed using CBr4 and alcohol. The reaction involves a radical pathway using a coordination activation strategy and single electron transfer process. The use of sustainable iron catalysis, selectivity, and the substrate scope are the important practical features.
In this paper, we introduce arylphosphinic acid aminoquinoline amides as competent substrates for cobalt-catalyzed sp2 C–H bond functionalization. Specifically, the feasibility of their coupling with alkynes, alkenes, and allyl pivalate has been demonstrated. Reactions are catalyzed by simple Co(NO3)2 hydrate in ethanol or mixed dioxane/tBuOH solvent in the presence of Mn(OAc)3·2H2O additive, sodium
在本文中,我们介绍了芳基次膦酸氨基喹啉酰胺作为钴催化的sp 2 C–H键功能化的有效底物。具体地,已经证明了它们与炔烃,烯烃和新戊酸烯丙酯偶联的可行性。在乙醇或Mn(OAc)3 ·2H 2 O添加剂,新戊酸钠或乙酸盐碱的存在下,通过简单的Co(NO 3)2水合物在乙醇或混合的二恶烷/ t BuOH溶剂中催化反应,并使用空气中的氧气作为氧化剂氧化剂。指导基团的除去提供了邻官能化的P,P-二芳基次膦酸。
Chelation-assisted C–N cross-coupling of phosphinamides and aryl boronic acids with copper powder at room temperature
phosphinamides and aryl boronic acids with copper powder under an oxygen atmosphere is reported. This reaction proceeds efficiently to afford fully substituted unsymmetrical N-arylation phosphinamides at room temperature in excellent yields. Diverse unstable functional groups on the benzene ring of aryl boronic acids such as vinyl, formyl, acetyl, sulfonyl, acetylamino, cyano, nitro, and trifluoromethyl
Cobalt-Catalyzed Diastereoselective [4+2] Annulation of Phosphinamides with Heterobicyclic Alkenes at Room Temperature
作者:Rajender Nallagonda、Neetipalli Thrimurtulu、Chandra M. R. Volla
DOI:10.1002/adsc.201701162
日期:2018.1.17
Cobalt‐catalyzed sp2 C−H bond functionalization of diarylphosphinamides with heterobicyclic alkenes was demonstrated at roomtemperature employing commercially available cobalt(II)‐salts. The effectiveness of this strategy was illustrated with the reaction of various 8‐aminoquinoline derived phosphinic amides and 7‐oxa/azabenzonorbornadienes. The reaction conditions exhibited excellent functional group tolerance