Bicyclic Bridgehead Phosphoramidite-Based Hybrid Diphosphorus Ligands: Design, Synthesis, and Application in Catalytic Asymmetric Hydrogenation
作者:Hong-Quan Du、Xiang-Ping Hu
DOI:10.1021/acs.orglett.1c02978
日期:2021.10.1
A strategy for chiral ligand design has been developed that allows for incorporation of an achiral bicyclic bridgehead phosphoramidite to generate a class of hybrid diphosphorus ligands for high activity and asymmetric control. Using this concept, a series of chiral phosphine–phosphoramidite ligands bearing the sole chirality at the ligand backbone have been prepared and successfully employed in the
Palladium(<scp>ii</scp>)-catalyzed vinylic geminal double C–H activation and alkyne annulation reaction: synthesis of pentafulvenes
作者:Jyotshna Phukon、Sanjib Gogoi
DOI:10.1039/c9cc09564k
日期:——
The first transition-metal-catalyzed vinylic geminal double C(sp2)-H activation and di-substituted alkyne annulationreaction is reported. This palladium(ii)-catalyzed, amide directed reaction of vinylic compounds with di-substituted alkynes offers an efficient synthetic path to pentafulvenes, which are very important compounds because of their bioactivity and interesting optical properties. A FeCl3-mediated
The iodoamination of o-(acylamino)styrene derivatives using iodine and sodium hydrogencarbonate, producing 7-acyl-8-iodomethylbicyclo[4.2.0]-7-azaoct-1,3,5-triene [1-acyl-2-(iodomethyl)benzazetine] derivatives, is described. Replacement of the iodo moiety by hydrogen or phenylthio group is also reported.