Pd-Catalyzed C(sp<sup>3</sup>)–H Biarylation via Transient Directing Group Strategy
作者:Mingruo Ding、Wenkai Hua、Min Liu、Fengzhi Zhang
DOI:10.1021/acs.orglett.0c02353
日期:2020.10.2
Here, we describe a highly selective Pd-catalyzed C(sp(3))-H biarylation of 2-methylbenzaldehydes using cyclic diaryliodonium salts as arylation reagents. The key strategy is the employment of tert-leucine as a bidentate transient directing group for the proximity-driven metalation to achieve reactivity and selectivity in C-H activation. Various functionalized biaryls bearing both aldehyde and iodine functional groups were prepared successfully, which could be further transformed into a wide range of compounds with potential applications in pharmaceutical chemistry and materials science.
CHARLTON, JAMES L.;KOH, KEVIN, TETRAHEDRON LETT., 29,(1988) N 44, C. 5595-5598