An efficient and practical route to various 3-alkoxylquinoxalin-2(1 H)-ones through visible-light photocatalytic C(sp^2)-H/O-H cross-dehydrogenation coupling of quinoxalin-2(1 H)-ones and alcohols,employing ambient ai...An efficient and practical route to various 3-alkoxylquinoxalin-2(1 H)-ones through visible-light photocatalytic C(sp^2)-H/O-H cross-dehydrogenation coupling of quinoxalin-2(1 H)-ones and alcohols,employing ambient air as an oxidant at room temperature under metal-free conditions,was developed.展开更多
An eco-friendly protocol for the synthesis of various 2-sulfonyl quinolines/pyridines through sulfonylation of heteroaromatic N-oxides with sodium sulfinates in water at ambient temperature under metal-and oxidant-fre...An eco-friendly protocol for the synthesis of various 2-sulfonyl quinolines/pyridines through sulfonylation of heteroaromatic N-oxides with sodium sulfinates in water at ambient temperature under metal-and oxidant-free conditions has been developed.The mild reaction conditions,high reaction efficiency,operational simplicity,short reaction time and remarkable functional-group compatibility make the developed protocol very attractive for the preparation of 2-sulfonyl N-heteroaromatic compounds.展开更多
An eco-friendly and economical route for the oxidation of 5-hydroxymethylfurfural(HMF) to 2,5-furandicarboxylic acid(FDCA) with atmospheric dioxygen as the sole oxidant under acid-,base-,metal-,and external initiator-...An eco-friendly and economical route for the oxidation of 5-hydroxymethylfurfural(HMF) to 2,5-furandicarboxylic acid(FDCA) with atmospheric dioxygen as the sole oxidant under acid-,base-,metal-,and external initiator-free conditions in minimal solvent was reported.In the present reaction,the 1,2-diethoxyethylane has a dual role:reaction medium and free-radical initiato r.The FDCA easily crystallizes during the reaction and was simple purified via recrystallization to provide the pure FDCA.展开更多
A simple and clean protocol for the synthesis of various alkyl and(hetero)aryl S-thiocarbamates was established.The usage of in situ generated hydroxide as both an oxygen source and hydrogen source as well as biomass-...A simple and clean protocol for the synthesis of various alkyl and(hetero)aryl S-thiocarbamates was established.The usage of in situ generated hydroxide as both an oxygen source and hydrogen source as well as biomass-derived 2-methyltetrahydrofuran as a green reaction medium,the avoidance of phosphorus-containing reductant,and the generation of harmless water and nitrogen as the sideproducts have given the present method atom-economy and environmental friendliness.展开更多
文摘An efficient and practical route to various 3-alkoxylquinoxalin-2(1 H)-ones through visible-light photocatalytic C(sp^2)-H/O-H cross-dehydrogenation coupling of quinoxalin-2(1 H)-ones and alcohols,employing ambient air as an oxidant at room temperature under metal-free conditions,was developed.
基金financial support from the Hunan Provincial Natural Science Foundation of China (No.2019JJ20008)
文摘An eco-friendly protocol for the synthesis of various 2-sulfonyl quinolines/pyridines through sulfonylation of heteroaromatic N-oxides with sodium sulfinates in water at ambient temperature under metal-and oxidant-free conditions has been developed.The mild reaction conditions,high reaction efficiency,operational simplicity,short reaction time and remarkable functional-group compatibility make the developed protocol very attractive for the preparation of 2-sulfonyl N-heteroaromatic compounds.
基金financial support from the Hunan Provincial Natural Science Foundation of China (Nos.2019JJ40090 and 2019JJ20008)
文摘An eco-friendly and economical route for the oxidation of 5-hydroxymethylfurfural(HMF) to 2,5-furandicarboxylic acid(FDCA) with atmospheric dioxygen as the sole oxidant under acid-,base-,metal-,and external initiator-free conditions in minimal solvent was reported.In the present reaction,the 1,2-diethoxyethylane has a dual role:reaction medium and free-radical initiato r.The FDCA easily crystallizes during the reaction and was simple purified via recrystallization to provide the pure FDCA.
基金financial support from the Hunan Provincial Natural Science Foundation of China (Nos.2019JJ50193 and 2019JJ20008)
文摘A simple and clean protocol for the synthesis of various alkyl and(hetero)aryl S-thiocarbamates was established.The usage of in situ generated hydroxide as both an oxygen source and hydrogen source as well as biomass-derived 2-methyltetrahydrofuran as a green reaction medium,the avoidance of phosphorus-containing reductant,and the generation of harmless water and nitrogen as the sideproducts have given the present method atom-economy and environmental friendliness.
