new twist: A one‐pot nitrous acid free, diazonium‐free, and transition‐metal‐free variation of the Fischer indole synthesis has been developed. Condensation of quinone monoketals and aliphatic hydrazine hydrochlorides afforded indoles via intermediate alkylaryldiazenes. This method will complement the classical Fischer indole synthesis by providing indoles in two steps from widely available phenols
Palladium-Catalyzed Coordination-Induced Remote C–H Aryl Etherification/Amination of 8-Amidoquinolines
作者:Xiwei Xun、Xinmou Wang、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1021/acs.orglett.4c02061
日期:2024.8.9
direct method for palladium-catalyzed coordination-induced oxidative remote C–H aryl etherification of 8-amidoquinolines with p-benzoquinone monoacetal. The method provides access to C5-aryl etherified quinolines and shows site-selectivity different from that of typical palladium-catalyzed C(sp2)–H activation reactions. The p-benzoquinone monoacetals act both as oxidants and as aryl etherification reagents