Cesium Carboxylate-Promoted Iridium Catalyzed C–H Amidation/Cyclization with 2,2,2-Trichloroethoxycarbonyl Azide
作者:Tao Zhang、Zhen Wang、Xuejiao Hu、Meng Yu、Tianning Deng、Guigen Li、Hongjian Lu
DOI:10.1021/acs.joc.6b00818
日期:2016.6.3
An Ir(III)-catalyzed direct C–H amidation/cyclization of benzamides using 2,2,2-trichloroethoxycarbonyl azide (TrocN3) as the aminocarbonyl source is reported. With the aid of cesium carboxylate, the reactions proceed efficiently and with high regioselectivity, producing various functionalized quinazoline-2,4(1H,3H)-diones, which are important building blocks and key synthetic intermediates for biologically
Iridium-Catalyzed C–H Amination/Cyclization for Medium to Large <i>N</i>-Heterocycle-Fused Dihydroquinazolinones
作者:Tao Zhang、Xunqing Dong、Hitesh B. Jalani、Jiaqi Zou、Guigen Li、Hongjian Lu
DOI:10.1021/acs.orglett.9b01167
日期:2019.5.17
A practical iridium-catalyzed cascade/stepwise synthesis of dihydroquinazolinones (DHQs) and bis-DHQs fused to medium to large N-heterocyclic rings is developed. The reaction undergoes benzamide-directed intermolecular C–H amination with an aldehyde-tethered alkyl azide, and then the newly installed amino group undergoes intramolecular cyclization with a remote aldehyde group present in azide and amidyl
Carbonyl-Assisted Iridium-Catalyzed C–H Amination Using 2,2,2-Trichloroethoxycarbonyl Azide
作者:Xunqing Dong、Mingzhou Shang、Shuguang Chen、Tao Zhang、Hitesh B. Jalani、Hongjian Lu
DOI:10.1021/acs.joc.2c01636
日期:2022.11.4
carbonyl-directed, mono C–H amination of arenes has been achieved using [Cp*Ir(III)Cl2]2 as the catalyst and 2,2,2-trichloroethoxycarbonyl (Troc) azide as an aminating reagent. The amination proceeds smoothly with a variety of arylcarbonyl compounds, including alkyl and vinyl arylketones, secondary and tertiary aryl amides, and acetyl indoles. The resulting ortho-TrocNH arylcarbonyl compounds are easily transformed