transformations are based on the fact that DMF can serve as a reaction solvent and one carbon synthon for the construction of heterocyclic rings. Moreover, this protocol features base-free and Brønsted acid free environmentally benign conditions with broad synthetic scope. A good scalability is demonstrated.
A selective functionalization of C–C═C bonds toward N–C═O bonds is realized by an n-Bu4NI-catalyzed reaction of 3-methylindoles with primaryamines using TBHP as the unique oxidant. The systematic process involves oxygenation, nitrogenation, ring-opening, and recyclization, affording a broad range of quinazolinones in good to excellent yields.
tert-Butyl Hydroperoxide Promoted the Reaction of Quinazoline-3-oxides with Primary Amines Affording Quinazolin-4(3<i>H</i>)-ones
作者:Jin Luo、Juelin Wan、Lianlian Wu、Lingyun Yang、Tao Wang
DOI:10.1021/acs.joc.2c00898
日期:2022.8.5
synthesis of quinazolin-4(3H)-ones via the reaction of quinazoline-3-oxides with primary amines is described. This approach is demonstrated to be applicable for a broad range of substrates and proceeds efficiently under metal-free and mild reaction conditions employing easily available tert-butyl hydroperoxide as the oxidant. Remarkably, 3-(2-(1H-indol-3-yl) ethyl)quinazolin-4(3H)-one 3w, which was conveniently
介绍了一种通过 quinazolin-3-氧化物与伯胺反应合成 quinazolin-4(3 H )-ones 的有效且简便的方法。这种方法被证明适用于广泛的底物,并且在使用容易获得的叔丁基过氧化氢作为氧化剂的无金属和温和的反应条件下有效地进行。值得注意的是,3-(2-(1 H -indol-3-yl) ethyl)quinazolin-4(3 H )-one 3w是通过该方法方便地以 70% 的收率获得的,是合成生物活性吴茱萸碱和鲁坦平。
Electrochemical oxidative decarboxylative of α-oxocarboxylic acids towards the synthesis of quinazolines and quinazolinones
environmentally electrochemical method for the synthesis of quinazolines and quinazolinones has been developed through anodic oxidation decarboxylative of α-oxocarboxylic acids. The present reaction was efficiently conducted by using simple and cheap NH4I as the N-source and electrolyte in an undivided cell. The desired products, quinazolines and quinazolinones, were isolated in high yield under chemical
Furan-2-carbaldehydes as C1 building blocks for the synthesis of quinazolin-4(3<i>H</i>)-ones <i>via</i> ligand-free photocatalytic C–C bond cleavage
作者:Wenjia Yu、Xianwei Zhang、Bingjie Qin、Qiyang Wang、Xuhong Ren、Xinhua He
DOI:10.1039/c8gc00079d
日期:——
efficient green C1 building blocks to synthesize bioactive quinazolin-4(3H)-ones by ligand-free photocatalytic C–C bondcleavage. Notably, protection of hydroxyl, carboxyl, amide, or secondary amino groups is not required. Mechanisticstudies suggest that conjugated N,O-tridentate copper complexes act as novel photoinitiators under visible light.