开发了一种一锅法制备2 H - azirine-2-羰基苯并三唑,该方法是通过苯并三唑与2 H -azirine-2-羰基氯的反应形成的,该反应是由Fe(II)催化的苯甲酰异构化生成的。 5-氯异恶唑。2 H-叠氮基-2-羰基苯并三唑与1,3-二酮的Co(II)催化反应以中等到良好的产率提供了2-(((苯并三唑-1-基)羰基)吡咯。碱促进的2-(((苯并三唑-1-基)羰基)吡咯与醛,酮,异氰酸酯和异硫氰酸酯的碱环合反应提供各种取代的吡咯并[1,2- c ]恶唑和1 H-吡咯并[1,2- c]咪唑衍生物,中等至高收率。这些加合物的6-酰基可被三氟甲磺酸除去,得到进一步的新的吡咯并稠合的O-和N-杂环,如6-未取代的吡咯并[1,2 - c ]恶唑-1(3 H)-和1 H-吡咯并[1,2- c ]咪唑-1,3(2 H)-二酮,而1 H-吡咯并[1,2- c ]咪唑-1,3(2 H当用POCl 3
Palladium Catalyzed Insertion Reaction of Isocyanides with 3-Arylisoxazol-5(4<i>H</i>)-ones: Synthesis of 4-Aminomethylidene Isoxazolone Derivates
作者:Yi-Ming Zhu、Pei Xu、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.joc.9b01585
日期:2019.9.6
A palladium catalyzed insert reaction of isocyanides to 3-arylisoxazol-5(4H)-ones for the construction of 4-aminomethylidene isoxazolone derivates is reported. In this transformation, only the C–H bond of the methylene group was involved while the remaining ring structure was retained. In general, this work provided a new protocol for the synthesis of 4-aminomethylidene isoxazolones.