Multidirectional Synthesis of Substituted Indazoles via Iridium-Catalyzed C–H Borylation
摘要:
In the absence of a steric directing group, iridium-catalyzed. C-H borylation of N-protected indazoles occurs rapidly and selectively at C-3 and the resulting boronate esters can be utilized in a range of downstream conversions. The functional group tolerance of the iridium-catalyzed C-H borylation reaction enables simple and efficient multidirectional syntheses of substituted indazoles to be realized.
Synthesis of 3-aryl-1H-indazoles via iridium-catalysed C–H borylation and Suzuki–Miyaura coupling
作者:Ben A. Egan、Paul M. Burton
DOI:10.1039/c4ra04235b
日期:——
The regioselective iridium-catalysed C3-borylation of 1H-indazoles has been achieved. Subsequent SuzukiâMiyaura coupling of the boronate esters with aryl chlorides, bromides and iodides affords 3-aryl-1H-indazoles in good yields.
Multidirectional Synthesis of Substituted Indazoles via Iridium-Catalyzed C–H Borylation
作者:Scott A. Sadler、Andrew C. Hones、Bryan Roberts、David Blakemore、Todd B. Marder、Patrick G. Steel
DOI:10.1021/acs.joc.5b00452
日期:2015.5.15
In the absence of a steric directing group, iridium-catalyzed. C-H borylation of N-protected indazoles occurs rapidly and selectively at C-3 and the resulting boronate esters can be utilized in a range of downstream conversions. The functional group tolerance of the iridium-catalyzed C-H borylation reaction enables simple and efficient multidirectional syntheses of substituted indazoles to be realized.