Copper-Catalyzed C-N, C-O Coupling Reaction of Arylglyoxylic Acids with Isatins
作者:Rashmi Prakash、Sanjib Gogoi
DOI:10.1002/adsc.201600516
日期:2016.10.6
The copper(II)‐catalyzed decarboxylative couplingreactions of arylglyoxylic acids with isatins afford 4H‐benzo[d][1,3]oxazin‐4‐ones via decarbonylation and concurrent C–N, C–O bond formation.
芳基乙醛酸与Isatin的铜(II)催化的脱羧偶联反应通过脱羰作用和同时的C–N,C–O键形成提供4 H-苯并[ d ] [1,3]恶嗪-4-酮。
One-Pot Synthesis of 2-Arylbenzoxazinones from 2-Arylindoles with (Diacetoxyiodo)benzene as the Sole Oxidant
作者:Xu-Qin Li、Xian-Xing Shang、Huu-Manh Vu
DOI:10.1055/s-0036-1590933
日期:2018.1
Abstract A series of synthetically interesting 2-arylbenzoxazinones was prepared from 2-arylindoles by an efficient oxidative reaction mediated by (diacetoxyiodo)benzene [PhI(OAc)2] and assisted by water. PhI(OAc)2 was used as the sole oxidant and water was a crucial additive. Our preliminary mechanistic investigations suggest that a water-involved, iodine(III)-promoted sequential oxidation of 2-arylindoles
Silver-Mediated Synthesis of 4<i>H</i>
-Benzoxazin-4-ones by Intramolecular Decarboxylative <i>O</i>
-Acylation Reactions with α-Oxocarboxylic Acid
作者:Kuppusamy Bharathimohan、Thanasekaran Ponpandian、Ahamed A. Jafar
DOI:10.1002/ejoc.201700176
日期:2017.5.18
The first example of intramolecular decarboxylative acylationreaction with α-oxocarboxylic acid has been described. This method offers a mild and rapid synthesis of 4H-benzoxazin-4-ones derivatives in high yields with silver salt.
novel and direct synthesis of benzoxazinones was developed via Cp*Co(III)-catalyzed C–Hactivation and [3 + 3] annulation between sulfoxonium ylides and dioxazolones. The reaction is conducted under base-free conditions and tolerates various functional groups. Starting from diverse readily available sulfoxonium ylides and dioxazolones, a variety of benzoxazinones could be synthesized in one step in 32%-75%
Recyclable Heterogeneous Palladium-Catalyzed Cyclocarbonylation of 2-Iodoanilines with Acyl Chlorides in the Biomass-Derived Solvent 2-Methyltetrahydrofuran
作者:Wenyan Hao、Zhaotao Xu、Zebiao Zhou、Mingzhong Cai
DOI:10.1021/acs.joc.0c00887
日期:2020.7.2
A highly efficient, green palladium-catalyzed cyclocarbonylation of 2-iodoanilines with acyl chlorides has been developed that proceeds smoothly in a biomass-derived solvent 2-methyltetrahydrofuran with N,N-diisopropylethylamine as base at 100 °C under 20 bar of carbon monoxide using an 2-aminoethylamino-modified MCM-41-anchored palladium acetate complex [2N-MCM-41-Pd(OAc)2] as a heterogeneous catalyst