Cu-Catalyzed Cross-Dehydrogenative Coupling of Heteroaryl C(sp<sup>2</sup>)–H and Tertiary C(sp<sup>3</sup>)–H Bonds for the Construction of All-Carbon Triaryl Quaternary Centers
A Cu-catalyzed protocol for cross-dehydrogenativecoupling of benzofuranones with quinolines, indoles, carbazoles, and thiophene, which furnishes highly functionalized 3,3-diaryl benzofuranones bearing a three aryl quaternary carbon center at the C3 position in good yields, has been developed. A radical mechanism is proposed.
Recyclable nickel-catalyzed C–H/O–H dual functionalization of phenols with mandelic acids for the synthesis of 3-aryl benzofuran-2(3<i>H</i>)-ones under solvent-free conditions
Cooperative catalysis: Green synthesis of 3-aryl benzofuran-2(3H)-ones under solvent-free conditions from phenols and mandelic acids using recyclable Ni(OTf)2 as a catalyst.
Chiral Calcium Phosphate Catalyzed Enantioselective Amination of 3-Aryl-2-benzofuranones
作者:Ruihan Liu、Suvratha Krishnamurthy、Zhenwei Wu、K. S. Satyanarayana Tummalapalli、Jon C. Antilla
DOI:10.1021/acs.orglett.0c03059
日期:2020.10.16
4-tert-butyl-phenyl substituted (R)-[H8]-BINOL chiral calcium phosphate catalyzedenantioselectiveamination of 3-aryl-2-benzofuranones with dibenzyl azodicarboxylate is described. The catalyst loading of the reaction is 1 mol %. This transformation is facile and has a high degree atom economy, which gave products with good yields and high enantioselectivities (79% to 99%). This reaction has excellent ee
I<sub>2</sub>-Mediated Cross-Dehydrogenative Coupling and Amidation of 3-Aryl Benzofuranones with Aryl Amines for the Synthesis of 3,3-Diaryl Indolin-2-ones
We have developed a protocol for efficient synthesis of indolin-2-ones from benzofuranones and arylamines using iodine as a mediator. A diverse range of benzofuranones and arylamines undergo cross-dehydrogenative coupling and amidation of 3-aryl benzofuranones for the cascade reaction to generate products in 24–93% yields. This reaction can be easily scaled-up to give an indolin-2-one in a gram scale