Site-Selective and Stereoselective <i>trans</i>-Hydroboration of 1,3-Enynes Catalyzed by 1,4-Azaborine-Based Phosphine–Pd Complex
作者:Senmiao Xu、Yuanzhe Zhang、Bo Li、Shih-Yuan Liu
DOI:10.1021/jacs.6b09759
日期:2016.11.9
A concise synthesis of monobenzofused 1,4-azaborine phosphine ligands (Senphos) is described. These Senphos ligands uniquely support Pd-catalyzed trans-selective hydroboration of terminal and internal 1,3-enynes to furnish corresponding dienylboronates in high efficiency and diastereoselectivity. X-ray structural analysis of the Senphos-Pd(0) complex reveals a κ2-P-η2-BC coordinationmode, and this
A one step synthesis of functionlized N-acylanthranilamidevia Pd-catalyzed carboxamidation of o-halo substituted N-phenylamide consisting of isocyanideinsertion followed by oxidation of the imine intermediate has been achived successfully. Furthermore, at elevated temprature (160oC) the Pd-catalyzed tandem reaction afforded functionlized quinazolin-4-one in a single step without the isolation of
Synthesis of Nitrogen-Doped Aza-Helicenes with Chiral Optical Properties
作者:Xue Gong、Chunmei Li、Zhixiong Cai、Xuejuan Wan、Haixia Qian、Guanghui Yang
DOI:10.1021/acs.joc.2c00371
日期:2022.7.1
possesses a very high interconversion energy barrier of 36.0 kcal/mol. Two enantiomers of 6H were successfully resolved by high-performance liquid chromatography and showed desired chiral opticalproperties. 6H with chiral optical activity and lone electrons can be a potential candidate for chiral switches, which was demonstrated using the UV and circular dichroism spectra obtained upon titration with an acid
Synthesis of 5,9‐Diaza Analogues of [5]‐ and [6]Helicene and their Chiroptic and Photophysical Characterization
作者:Stefan Herzog、Gianluca Giuseppe Rizzo、Joachim Podlech
DOI:10.1002/ejoc.202301240
日期:2024.4.8
5,9-Diaza[5]- and -[6]helicenes were synthesized by ortho,ortho’ fusion of ortho-teraryls. The [6]helicene could be resolved in its enantiomers. Photophysical properties of both compounds were determined by measurements and calculations.