Aerobic oxidative α-arylation of furans with boronic acids via Pd(<scp>ii</scp>)-catalyzed C–C bond cleavage of primary furfuryl alcohols: sustainable access to arylfurans
Aerobic oxidative α-arylation of furans with boronic acids via Pd(II)-catalyzed C–Cbondcleavage of primary furfuryl alcohol provides sustainable access to arylfurans. This α-arylation protocol opens a new avenue for the transformation of readily available furans into other useful compounds.
A highlyefficientsynthesis of a wide range of 2,5-disubstituted furans from enyne acetates is described. The reactions are conducted by using Lewis acid and palladiumcatalyst and provide symmetrical and unsymmetrical products in good to excellent yields, with broad substrate scope, including a variety of aromatic and aliphatic substituents in the 2- and 5-position of the furan ring.
Titanium-Mediated Domino Cross-Coupling/Cyclodehydration and Aldol-Addition/Cyclocondensation: Concise and Regioselective Synthesis of Polysubstituted and Fused Furans
作者:Lu Ren、Juan Luo、Linbo Tan、Qiang Tang
DOI:10.1021/acs.joc.1c02894
日期:2022.3.4
Titanium enolates, in situ-generated from readily available ketones and titanium tetraisopropoxide, undergo domino cross-coupling/cyclodehydration or domino Aldol-addition/cyclocondensation with α-chloroketones to provide synthetically valuable furan derivatives. The domino process tolerates a variety of cyclic and acyclic ketones and chloroketones, producing polysubstituted furans and bi-, tri-, and