The Biginelli product, dihydropyrimidinone (DHPM) core, and its derivatives are of immense
biological importance. There are several methods reported as modifications to the original …

The Biginelli reaction, involving a three-component reaction of an aromatic aldehyde, urea
and ethyl acetoacetate, has emerged as an extremely useful synthetic tool to organic …

The asymmetric Biginelli reaction was investigated in the presence of N-[(2 S, 4 R)-4-
hydroxyprolyl]-(S)-1-phenylethylamine as chiral inducer and silicon, titanium or aluminum …

Several chiral phosphoric acids were evaluated as organocatalysts for the enantioselective
Biginelli reaction of aliphatic aldehydes. With a chiral phosphoric acid derived from 3, 3 …

Using the sol-gel and coprecipitation methods, individual oxides of silicon, titanium,
zirconium and double oxides TiO2–SiO2, TiO2–ZrO2, ZrO2–SiO2 have been synthesized …

Materials of the ZrO2-SiO2 system were obtained by the sol-gel method applying two
different types of ZrO2 precursors: zirconium (IV) n-propoxide Zr (OC3H7) 4 and zirconium …

4-Hydroxy-(2 S)-prolines bearing 3, 4-dihydro-2 H-1, 4-benzoxazine or 1, 2, 3, 4-
tetrahydroquinoline fragments were synthesized and studied as chiral catalysts in the …

Data on the use of metal oxides and silica as catalysts of reactions that are most in demand
in laboratory organic synthesis are summarized. The potential of oxide catalysts for …

One well-known multicomponent reaction that is helpful in the synthesis of
dihydropyrimidinones (DHPMs), important molecules in organic synthesis and medicinal …

Обобщены данные по использованию оксидов металлов и кремния в качестве
катализаторов реакций, которые наиболее востребованы в лабораторном …