More Sustainable Approaches for the Synthesis of N-Based Heterocycles | Chemical Reviews
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Data published in the last 10 years on the use of the aza-Michael reaction in organic
synthesis are described systematically. The attention is focused on environmentally friendly …

The use of a heterogeneous Lewis acid catalyst, which is insoluble and easily separable
during the reaction, is a promising option for hydrolysis reactions from both environmental …

The Friedel–Crafts addition of indoles to α, β-unsaturated ketones, and nitro styrenes was
studied with graphite oxide as catalyst. Various indole derivatives were synthesized in good …

1, 4-Addition of anilines onto Michael acceptors proceeds easily in specific polar protic
solvents, without any promoting agent. According to the solvent and to the electrophile, the …

Abstract The 1, 4‐conjugated addition of nitrogen centered nucleophiles to electron‐
deficient alkenes, historically called the aza‐Michael addition, is one of the most significant …

Zirconyl chloride was found to be an efficient catalyst for the cycloaddition reaction of
aziridines with CO2, thus leading to the preferential formation of 5-aryl-2-oxazolidinones …

Lewis acids are important and interesting catalysts in most organic transformations. Among
different Lewis acids, Zr (IV) species such as ZrCl 4 and ZrOCl 2· 8H 2 O are allocated …

Silica gel supported zirconyl chloride octahydrate was found to be an efficient and
recyclable catalyst for the synthesis of a series of biologically important molecules in high …

Highly convenient base-free Michael reaction of β-dicarbonyl, β-keto ester, and α-cyano
ester compounds with activated ethylene compounds in air at ambient temperature …