4-Biarylyl-1-phenylazetidin-2-ones useful for the treatment of hypercholesterolemia are disclosed. The compounds are of a general formula (I) in which formula (II) represents an aryl or heteroaryl residue, Ar represents an aryl residue; U is a two to six atom chain; and the R’s represent substituents.
Palladium-Catalyzed C–P(III) Bond Formation by Coupling ArBr/ArOTf with Acylphosphines
作者:Xingyu Chen、Hongyu Wu、Rongrong Yu、Hong Zhu、Zhiqian Wang
DOI:10.1021/acs.joc.1c00937
日期:2021.7.2
differential phosphination reagents is reported. The acylphosphines show practicable reactivity with ArBr and ArOTf as the phosphination reagents, though they are inert to the air and moisture. The reaction affords trivalent phosphines directly in good yields with a broad substrate scope and functional group tolerance. This reaction discloses the acylphosphines’ capability as new phosphorus sources for the direct
A novel, hydrophilic and recyclable methoxypolyethylene glycol (PEG)-modulated s-triazine-based multifunctional Schiffbase/N,P-ligand L9 was prepared and used in Pd-catalyzed Heck-type carbonylative couplingreactions, affording diverse chalcone derivatives and 1,4-dicarbonyl esters in good yields.
Catalytic Alkyne Arylation Using Traceless Directing Groups
作者:Jung‐Woo Park、Bubwoong Kang、Vy M. Dong
DOI:10.1002/anie.201804955
日期:2018.10.8
to generate enamines, which are then hydrolyzed to either α‐arylphenones or α,α‐diarylketones. This Pd‐catalyzed method overcomes established known pathways to enable the use of amines as tracelessdirectinggroups for C−C bond formation.
Inverting Conventional Chemoselectivity in the Sonogashira Coupling Reaction of Polyhalogenated Aryl Triflates with TMS-Arylalkynes
作者:Miao Wang、Chau Ming So
DOI:10.1021/acs.orglett.1c04138
日期:2022.1.21
Sonogashira couplingreaction with excellent chemoselectivity, affording an inversion of the conventional chemoselectivity order of C–Br > C–Cl > C–OTf. This study also provided an efficient approach to the synthesis of polycyclic aromatic hydrocarbons (PAHs) and the natural product analogue trimethyl-selaginellin L by merging of chemoselective Sonogashira and Suzuki–Miyaura couplingreactions.