N–S bond cleavage of tosyl hydrazones by dual reactive arynes: synthesis of diaryl sulfones, spiro[indazole-3,3′-indolin]-2′-one, and <i>N</i>-phenyl sulfonohydrazides
作者:Suresh Snoxma Smile、Ponnusamy Shanmugam
DOI:10.1039/d3nj00050h
日期:——
A novel one-pot N–S bond cleavage of tosyl hydrazone derivatives of isatin and fluorenone by (het)arynes was discovered. The reaction produced diverse diaryl and heteroaryl-aryl sulfones as major products and diazomethyledenes of isatin/fluorenone or spiro[indazole-3,3′-indolin]-2′-one via [3+2]-dipolar cycloaddition reaction between diazomethyledenes of isatin/fluorenone and arynes, and N-phenyl
发现了一种通过(杂)芳烃对靛红和芴酮的甲苯磺酰腙衍生物进行新型单锅 N-S 键裂解的方法。该反应通过靛红重氮亚甲基之间的[3+2]-偶极环加成反应生成多种二芳基和杂芳基-芳基砜作为主要产物和靛红/芴酮或螺[吲唑-3,3'-吲哚]-2'-酮的重氮亚甲基/fluorenone 和 arynes, 和N-苯基苯磺酰肼通过直接N-芳烃的芳基化。已经确定产物的分布取决于芳烃的性质以及氟离子和底物的来源。通过光谱和XRD方法确定了产物的结构。通过调用芳烃作为亲核试剂和亲电子试剂的双重反应性,提供了形成所有产物的两种似是而非的反应机制。