Palladium Catalyzed Cyclizations of Oxime Esters with 1,2-Disubstituted Alkenes: Synthesis of Dihydropyrroles
摘要:
Pd-catalyzed cyclizations of oxime esters with 1,2-dialkylated alkenes provide an entry to chiral dihydropyrroles. Substrate and catalyst controlled strategies for selective product formation (vs alternative pyrroles) are outlined.
Palladium Catalyzed Cyclizations of Oxime Esters with 1,2-Disubstituted Alkenes: Synthesis of Dihydropyrroles
摘要:
Pd-catalyzed cyclizations of oxime esters with 1,2-dialkylated alkenes provide an entry to chiral dihydropyrroles. Substrate and catalyst controlled strategies for selective product formation (vs alternative pyrroles) are outlined.
Highly Regioselective Difluoroalkylarylation of Butadiene through a Nickel-Catalyzed Tandem Radical Process
作者:Shucheng Ma、Fangjie Li、Guisheng Zhang、Lei Shi、Xiaoming Wang
DOI:10.1021/acscatal.1c04237
日期:2021.12.17
A nickel-catalyzedreaction of 1,3-butadiene with easily accessible difluoroalkyl bromides and arylboronic acids has been realized, affording the corresponding 1,4-difluoroalkylarylation products in good yields with high regioselectivities. The procedure can also be successfully extended to nonfluorinated alkyl bromides. A radical clock experiment suggests that a key alkyl radical is involved in the