Described is a concise and practical method for the direct amidation at the C-3 position of quinoxalin-2(1H)-ones through an acid-promoted carbamoylation using isocyanide in water. The use of environmentally friendly water as a solvent and inexpensive isocyanide as a carbamoylation reagent makes this method promising for the synthesis of druglike structures. Additionally, this study expands the application of isocyanide in organic chemistry.
Described herein is a concise and practical direct amidation at the C-3 position of quinoxalin-2(1H)-ones through an acid-promoted carbamoylation with isocyanide in water. In this conversion, environmentally friendly water and commercial inexpensive isocyanide were used as a solvent and carbamoylation reagent, respectively. This study not only provides a green and efficient strategy for the construction of 3-carbamoylquinoxalin-2(1H)-one derivatives that can be applied to the synthesis of druglike structures but also expands the application of isocyanide in organic chemistry.
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