Reaction of quinoxalin-2-ones with TosMIC reagent: synthesis of imidazo[1,5-a]quinoxalin-4-ones
摘要:
Imidazo[1,5-alpha ]quinoxalin-4-ones were prepared in four steps starting from 1,2-phenylenediamines using a new strategy for the construction of the ring system. A key step in this new method involves the reaction of quinoxalin-2-ones with TosMIC (tosylmethyl isocyanide). (C) 2001 Elsevier Science Ltd. All rights reserved.
Reaction of quinoxalin-2-ones with TosMIC reagent: synthesis of imidazo[1,5-a]quinoxalin-4-ones
摘要:
Imidazo[1,5-alpha ]quinoxalin-4-ones were prepared in four steps starting from 1,2-phenylenediamines using a new strategy for the construction of the ring system. A key step in this new method involves the reaction of quinoxalin-2-ones with TosMIC (tosylmethyl isocyanide). (C) 2001 Elsevier Science Ltd. All rights reserved.
A visible‐light‐induced photocatalytic aerobic oxidation/[3+2] cycloaddition/aromatization cascade between secondary amines and isocyanides has been successfully developed. The reaction provides a general and efficient access to diversely substituted imidazoles and imidazo[1,5‐a]quinoxalin‐4(5 H)‐ones in good yields under mild conditions.
仲胺和异氰酸酯之间的可见光诱导的光催化需氧氧化/ [3 + 2]环加成/芳构化级联反应已成功开发。该反应可在温和条件下以高收率普遍有效地获得各种取代的咪唑和咪唑并[1,5 - a ]喹喔啉-4(5 H)-酮。