Efficient Synthesis of N-Substituted 4-Arylquinoline Derivatives Using ZnCl2 or ZrO2
摘要:
N-Substituted 7,8-dihydro-7,7-dimethyl-4-arylquinolin-5 (1H,4H,6H)-ones 4a-1 have been reported by one-pot reaction of cinnamaldehyde derivatives, dimedone and various amines in the presence of ZnCl2 or ZrO2 in fairly high yields.
Enantioselective Rhodium-Catalyzed [4 + 2] Cycloaddition of α,β-Unsaturated Imines and Isocyanates
摘要:
A [4 + 2] cycloaddition of alpha,beta-unsaturated imines and isocyanates catalyzed by a phosphoramidite rhodium complex provides pyrimidinones in good yields and high enantioselectivities.