Acetalization/thioacetalization of carbonyl compounds, under solvent free conditions, has
been described using acidic ionic liquid 1-Butyl-3-methylimidazolium hydrogen sulfate …

A facile and efficient protocol for the synthesis of 9-aryl/alkyl-3, 3, 6, 6-tetramethyl-1, 2, 3, 4,
5, 6, 7, 8-octahydroxanthene-1, 8-diones has been developed by one-pot reaction of …

Phosphorus pentoxide supported on silica gel or alumina (P 2 O 5/SiO 2, P 2 O 5/Al 2 O 3)
has been used in many organic transformations as versatile solid catalysts. These catalysts …

A facile and efficient protocol for the synthesis of chromeno [2, 3-d] pyrimidinones and
diazabenzo [b] fluorenones has been developed by one-pot three-component …

Phosphorus pentoxide supported on silica gel (P2O5/SiO2) has been used as an efficient
and reusable catalyst for the one‐pot pseudo four‐component synthesis of 2, 4, 5 …

Silica supported phosphorus pentoxide (P2O5· SiO2) is an efficient catalyst for synthesis of
1, 3, 5-substituted pyrazoles via the condensation of 1, 3-DIKETONES and HYDRAZINES …

A convenient synthetic method for N-acylation of sulfonamides in the presence of P 2 O
5/SiO 2 is described. Carboxylic acid anhydrides and carboxylic acid chlorides were used as …

Al (HSO4) 3 as a solid acid was applied for acetalization of carbonyl compounds at room
temperature and under solvent-free conditions with good to excellent yields. The cheapness …

Hydantoin bromide is an effective catalyst for chemoselective thioacetalization of aldehydes
in the presence of ketones under neutral conditions. In addition, a simple and efficient …

Silica phenyl sulfonic acid (SPSA) is an effective catalyst for chemoselective
thioacetalization of aldehydes in the presence of ketones under neutral conditions. In …