A new type of C(2)-symmetric chiral bisguanidine was designed as a highly efficient catalyst in the inverse-electron-demandhetero-Diels-Alderreaction of chalcones with azlactones for the first time. A wide variety of gamma,delta-unsaturated delta-lactone derivatives with alpha-quaternary-beta-tertiary stereocenters were obtained in high yields (up to 88%) with excellent enantioselectivities (up to
Metal‐organic framework [Fe(BTC) (BTC=1,3,5‐benzenetricarboxylic acid)] is a convenient heterogeneous catalyst for the carbon‐carbon bond forming reaction in toluene between acetophenone and benzaldehyde to give selectively chalcone in high yield. Fe(BTC) appears as a general catalyst able to synthesize selectively different chalcone derivatives bearing various functionalities. Fe(BTC) could be recycled
Twenty-two pyrazoline derivatives were synthesized and tested for their human MAO (hMAO) inhibitory activity. Twelve molecules with unsubstituted ring A and substituted ring C (5–16) were found to be potent inhibitors of hMAO-A isoform with SIMAO-A in the order 103 and 104. Ten molecules with unsubstituted ring A and without ring C (21–30), in which eight molecules (21, 23–26, and 28–30) were selective
A series of 2,4,6-triarylpyridines have been synthesized via an efficient solvent-free reaction between guanidine hydrochloride and chalcones undermicrowaveirradiation in excellent yields.
The first catalyticasymmetric dynamic resolution of unprotected racemic 3-(4-alkylcyclohexylidene)indolin-2-ones via one step directvinylogousMichael reaction with chalcones was realized by a chiral N,N′-dioxide/Sc(III) complex catalytic system. A variety of (Z)-4-alkyl-2-((3-oxo-1,3-diarylpropyl)cyclohexylidene)-indolin-2-ones with three stereogeniccenters at ξ-, γ- and δ’-positions were obtained