Palladium Catalyzed Cross-Coupling Reaction of Stereodefined Cyclopropylboronic Acids with N-Heterocycl Bromides
作者:Huai-Rang Ma、Xiao-Hong Wang、Min-Zhi Deng
DOI:10.1080/00397919908086254
日期:1999.7
The Suzuki-type cross-coupling reaction of stereodefined cyclopropylboronic acids with N-heterocycl bromides was investigated. In the appropriate conditions the coupling reactions readily underwent to afford stereocontrolled cyclopropyl substituted N-heterocycles in moderate to good yields. The configuration of cycloplopylboronic acids retained during the reaction.
A practical approach to stereodefined cyclopropyl-substituted heteroarenes using a Suzuki-type reaction
作者:Min-Liang Yao、Min-Zhi Deng
DOI:10.1039/b001051k
日期:——
In the presence of Pd(PPh3)4, NaBr and KF·2H2O the cross-coupling reaction of heteroaryl triflates with trans-cyclopropylboronic acids proceeds readily to give pure trans-cyclopropyl heteroarenes in moderate to good yields. The X-ray crystallography of compound 3g and 1H-NMR spectra of all products show that the configuration of the cyclopropyl group was retained during the reaction. Under the same reaction conditions, highly
optically active cyclopropyl-substituted heteroarenes (up to 94% ee) were obtained by
cross-coupling of heteroary/triflates with enantiomerically enriched cyclopropylboronic acids.