[4 + 2] Annulation Cascades of 2-Bromo-1-arylpropan-1-ones with Terminal Alkynes Involving C–Br/C–H Functionalization
作者:Xuan-Hui Ouyang、Chao Hu、Ren-Jie Song、Jin-Heng Li
DOI:10.1021/acs.orglett.8b01962
日期:2018.8.3
various substituted naphthalenones by copper-catalyzed [4 + 2] annulation cascades of 2-bromo-1-arylpropan-1-ones with terminal alkynes is presented. Employing a Cu(MeCN)4PF4 catalyst and 1,10-phenanthroline (1,10-Phen) ligand enables the formation of three new C–C bonds in a single reaction via [4 + 2] annulation of a 2-bromo-1-arylpropan-1-one with an alkyne followed by α-alkylation with the other
提出了由铜催化的2-溴-1-芳基丙烷-1-酮与末端炔烃的铜催化[4 + 2]正环式级联反应,直接获得各种取代的萘酮。通过使用Cu(MeCN)4 PF 4催化剂和1,10-菲咯啉(1,10-Phen)配体,可通过[4 + 2]环抱2-溴使单个反应中形成三个新的C–C键。用炔烃将-1-芳基丙烷-1-酮与炔烃进行α-烷基化反应,然后再与其他2-溴-1-芳基丙烷-1-酮进行α-烷基化反应,具有出色的官能团耐受性和步进效率。