Transfer hydrogenation is challenging to apply to aryl halide reductive cross-couplings because of competing hydrogenolysis. Now aryl halide cross-couplings mediated by sodium formate have been developed. These processes display orthogonality to Suzuki and Buchwald–Hartwig couplings as pinacol boronates and anilines are tolerated and, owing to chelated intermediates, effective for challenging 2-pyridyl systems.
- Yoon Cho
- Yu-Hsiang Chang
- Michael J. Krische