the synthesis of functionalized quinolines from 2-aminobenzyl alcohols with α,β-unsaturated ketones. This method exhibits tolerance to various functional groups and high efficiency, is environmentally benign, and can be performed on a gram scale. Control experiments suggest that this transformation is accomplished by iridium complex catalyzed transferhydrogenation, which is then followed by Friedländer
Base-catalyzed synthesis of amides and imines via C–C and CC bond cleavage
作者:Dilip Kumar T. Yadav、Bhalchandra M. Bhanage
DOI:10.1039/c4ra14234a
日期:——
A transition metal free base catalyzed approach for C–N bond formation via C–C and CC bond activation has been developed. The N-arylureas reacted smoothly with 1,3-dicarbonyls and α,β-unsaturated ketones to furnish the corresponding amides and imines respectively in moderate to excellent yields.
Enantioselective copper-catalyzed 1,4-additions of dialkylzincs to enones were carried out in the presence of 1 mol % of Cu(OTf)(2) and 2.5 mol % of an N,N,P-ligand possessing a tert-butyl group at the adjacent position of the nitrogen of pyridine to afford the corresponding 1,4-adducts in up to 98% ee. (C) 2012 Elsevier Ltd. All rights reserved.
Convenient stereoselective synthesis of (Z)-chalcone derivatives from 1,3-diaryl-2-propynyl silyl ethers
作者:Kazuhiro Yoshizawa、Takayuki Shioiri
DOI:10.1016/j.tetlet.2006.05.021
日期:2006.7
Various (Z)-chalcone derivatives were easily synthesized in a stereoselective manner from 1,3-diaryl-2-propynyl silyl ethers by a catalytic reaction using potassium tert-butoxide under very mild conditions after acid treatment.