NEW SYNTHESIS OF NAPHTHO- AND BENZOXAZOLES: DECOMPOSITION OF NAPHTHO- AND BENZOXAZINONES WITH KOH
摘要:
A method that allows the synthesis of 4 different heterocyclic systems of fused aryl oxazoles, i.e., naphtho[1,2-d], naphtho[2,1-d], naphtho[2,3-d], and benzo[d]oxazoles in reasonable yield is del scribed. This method consists of the decomposition of naphtho- and benzoxazinones with KOH.
NEW SYNTHESIS OF NAPHTHO- AND BENZOXAZOLES: DECOMPOSITION OF NAPHTHO- AND BENZOXAZINONES WITH KOH
摘要:
A method that allows the synthesis of 4 different heterocyclic systems of fused aryl oxazoles, i.e., naphtho[1,2-d], naphtho[2,1-d], naphtho[2,3-d], and benzo[d]oxazoles in reasonable yield is del scribed. This method consists of the decomposition of naphtho- and benzoxazinones with KOH.
Brønsted acid as the cocatalyst, such as hydrochloric acid, to form a possible single anion-binding interaction with the substrate and catalyst, which greatly contributed to the improvement of reactivity and enantioselectivity. Importantly, a creative and efficient synthetic route was developed to construct the important intermediate for the potential IgE/IgG receptor modulator through our catalytic methodology
Microwave assisted regioselective halogenation of benzo[<i>b</i>][1,4]oxazin-2-ones <i>via</i> sp<sup>2</sup> C–H functionalization
作者:Sandeep Kumar、Prince、Mohit Gupta、Ram Sunil Kumar Lalji、Brajendra K. Singh
DOI:10.1039/d2ra07259a
日期:——
We are reporting a palladium catalyzed microwave assisted halogenation of 3-phenyl-2H-benzo[b][1,4]oxazine-2-ones.
我们报告了一种钯催化微波辅助卤化 3-苯基-2H-苯并[b][1,4]恶嗪-2-酮的方法。
Construction of benzoheterocycles by the reaction of α-arylglyoxylic acids and <i>ortho</i>-functionalized aniline under mild and minimal conditions
作者:Hang Gong、Fangyuan Zhou、Changqun Cai
DOI:10.1039/d3ob01163a
日期:——
benzoxazinones, quinoxalinones and benzothiazoles by the reaction of α-arylglyoxylic acids and ortho-functionalized aniline. In this reaction, no other reagents are needed except for reactants and solvents. The reaction was carried out at a mild temperature of 50 °C with only water and/or carbon dioxide as the by-product. Therefore, the reaction has high practical atom economy. In addition, this strategy