A highly efficient, selective synthesis of benzyl esters by palladium catalysis is developed through the bidentate directing group assisted functionalization of multiple C(sp3)–H bonds.
A general palladium catalyzed acetoxylation of benzylicC–H bonds has been developed. Picolinamides serve as an excellent directinggroup for the C–H activation of benzylic methyls. A wide range of 2-amino benzyl alcohol analogues were synthesized in good yields. The products demonstrated broad synthetic utilities toward various benzo-fused heterocycles. Mechanistic studies revealed the key rate-limiting
Palladium-Catalyzed Regioselective Insertion of Carbenes into γ-C(sp<sup>3</sup>)–H Bonds of Aliphatic Amines
作者:Peng Zhang、Cheng-xin Li、ShihaoZhi Wang、Xue-jing Zhang、Ming Yan
DOI:10.1021/acs.orglett.4c00038
日期:2024.4.5
migratory insertion of carbenes into distal γ-C(sp3)–H bonds of aliphatic amines has been successfully developed. The synergistic interplay among a palladium catalyst, picolinamide directing group, a carefully selected base additive, and an essential ligand proved crucial in achieving high yields. These findings hold significant value for advancing the exploration of regioselective carbeneinsertions into