Iridium- and Rhodium-Catalyzed Directed C–H Heteroarylation of Benzaldehydes with Benziodoxolone Hypervalent Iodine Reagents
作者:Erwann Grenet、Jérôme Waser
DOI:10.1021/acs.orglett.8b00337
日期:2018.3.2
The C–H heteroarylation of benzaldehydes with indoles and pyrroles was realized using the benziodoxolone hypervalent iodine reagents indole- and pyrroleBX. Functionalization of the aldehyde C–H bond using either an o-hydroxy or amino directing group and catalyzed by an iridium or a rhodium complex allowed the synthesis of salicyloylindoles and (2-sulfonamino)benzoylindoles, respectively, with good
苯甲醛与吲哚和吡咯的C–H杂芳基化是使用苯并恶唑啉酮高价碘试剂吲哚和吡咯BX实现的。使用邻羟基或氨基直接基团并通过铱或铑络合物催化的醛CH键的功能化可以分别合成水杨基羟吲哚和(2-磺氨基)苯甲酰基吲哚,产率高至优异(74– 98%)。这种新的转化可以在温和的条件下(室温至40°C)进行,并且可以耐受各种功能,例如醚,卤素,羰基或硝基。