An efficient and highly regio- and stereoselctive Pd-catalyzed β-arylation method for the formation of β-aryl allylicalcohols, employing aryl iodides, 1-bromo-2-iodobenzenes, and 2-bromobezaldehydes as coupling partners, is presented. The β-aryl allylicalcohols formed in this Pd-catalyzed transformation is unexpected under conventional Jeffery conditions without the assistance of silver salt. It
An efficient and practical method is described for the direct synthesis of 1,3-dihydroisobenzofurans, an important structural motif present in biologically active natural or synthetic compounds.
Domino Synthesis of 3-Alkyliden-2,3-Dihydro-4-Quinolones
作者:Esther Raga、Marcos Escolano、Javier Torres、Fernando Rabasa-Alcañiz、María Sánchez-Roselló、Carlos del Pozo
DOI:10.1002/adsc.201801490
日期:2019.3.5
The synthesis of 3‐alkyliden‐2,3‐dihydro‐4‐quinolones has been accomplished in a domino fashion through a three‐step sequence that comprised an initial aza‐Baylis‐Hillman reaction, followed by a 1,3‐rearrangement and an intramolecular amination. Starting from readily available aryl vinyl ketones and N‐tosyl imines, the reaction with PPh3, CsOAc and CuI in CH3CN gave rise, in good overall yields, to