An Efficient Synthesis of 2-Quinoxalinecarboxylic Acid
摘要:
Development of a cost efficient and scaleable process for 2-quinoxalinecarboxylic acid is described. The primarily goals of the development work were to improve the overall yield of the process, to minimize the use of environmentally unacceptable materials, and to obtain a material with a high level of purity. A variety of approaches were examined, and the most efficient method was a condensation of o-phenylenediamine with a monosaccharide followed by a mild peroxide oxidation.
An Efficient Synthesis of 2-Quinoxalinecarboxylic Acid
作者:Arthur E. Harms
DOI:10.1021/op049951d
日期:2004.7.1
Development of a cost efficient and scaleable process for 2-quinoxalinecarboxylic acid is described. The primarily goals of the development work were to improve the overall yield of the process, to minimize the use of environmentally unacceptable materials, and to obtain a material with a high level of purity. A variety of approaches were examined, and the most efficient method was a condensation of o-phenylenediamine with a monosaccharide followed by a mild peroxide oxidation.
MOF-Derived Subnanometer Cobalt Catalyst for Selective C–H Oxidative Sulfonylation of Tetrahydroquinoxalines with Sodium Sulfinates
The development and utilization of reusable base-metal catalysts is a central topic in catalysis. Herein, via a catalyst design strategy, we present the preparation of a highlydispersed and acid-resistant subnanometer cobalt catalyst (<1 nm) by a MOF-templated method, which has been utilized for selective C–H oxidative sulfonylation of tetrahydroquinoxalines with odorless sodium sulfinates. The transformation