Rational Development of Remote C−H Functionalization of Biphenyl: Experimental and Computational Studies
作者:Zhoulong Fan、Katherine L. Bay、Xiangyang Chen、Zhe Zhuang、Han Seul Park、Kap‐Sun Yeung、K. N. Houk、Jin‐Quan Yu
DOI:10.1002/anie.201915624
日期:2020.3.16
compounds is reported. Compared to the previous approach of installing a complex U-shaped template to achieve a molecular U-turn and assemble the large-sized cyclophane transition state for the remoteC-Hactivation, a synthetically useful phenyl nitrile functional group could also direct remote meta-C-H activation. This reaction provides a useful method for the modification of biaryl compounds because
An Extremely Active Catalyst for the Negishi Cross-Coupling Reaction
作者:Jacqueline E. Milne、Stephen L. Buchwald
DOI:10.1021/ja0474493
日期:2004.10.1
A new catalyst system for the Pd-catalyzed cross-coupling of organozinc reagents with aryl halides (Negishi coupling) has been developed. This system permits efficient preparation of hindered biaryls (tri- and tetra-ortho-substituted), functions effectively at low levels of catalyst, and tolerates a wide range of functional groups and heterocyclic substrates. A systematic study of ligand structure
The first highly enantioselective hydrogenation of carbocyclic aromatic amines has been successfully realized using in situ-generated chiral ruthenium complex as catalyst, affording facile access to chiral exocyclic amines with up to 98% ee.