Enantioselective Copper‐Catalyzed Borylative Cyclization for the Synthesis of Quinazolinones
作者:Quentin Dherbassy、Srimanta Manna、Chunling Shi、Watcharapon Prasitwatcharakorn、Giacomo E. M. Crisenza、Gregory J. P. Perry、David J. Procter
DOI:10.1002/anie.202103259
日期:2021.6.21
Quinazolinones are common substructures in molecules of medicinal importance. We report an enantioselectivecopper-catalyzed borylative cyclization for the assembly of privileged pyrroloquinazolinone motifs. The reaction proceeds with high enantio- and diastereocontrol, and can deliver products containing quaternary stereocenters. The utility of the products is demonstrated through further manipulations
The rhodium-catalyzed controllable diverse arylation of 2,5-dihydrofuran with arylboronic acids is reported. By fine-tuning of the reaction conditions, four different ring-opening or oxidative arylation pathways are controlled in the rhodium-catalyzedarylation of 2,5-dihydrofuran, granting selective access to 2-aryl or 3-aryl homoallylic alcohols and 3-aryl or 4-aryl-2,3-dihydrofurans. The catalytic
A photoredox-catalyzed multifluoromethyl radical addition/SO2 incorporation/polar cyclization cascade approach to multifluoromethylated γ-sultines has been developed. The reaction proceeds with broad functional-group tolerance and good yields. Key to the success of the protocol is use of oxidizable multifluoroalkanesulfinates as bifunctional reagents.
Metal-Catalyst-Controlled Divergent Synthesis of γ-Butyrolactones via Intramolecular Coupling of Epoxides with Alcohols
作者:Feipeng Liu、Zifan Cheng、Yiyun Fang、Xuchao Wang、Lingzi Zhao、Zi-Qiang Rong
DOI:10.1021/acs.orglett.3c00898
日期:2023.5.26
A metal-controlled divergent protocol for the synthesis of α- and β-substituted γ-butyrolactones was developed through intramolecular coupling of epoxides with alcohols. This method provides an efficient and practicable way to afford γ-butyrolactones with good efficiency, excellent regioselectivity, and broad substrate scope.