Current Catalysis - Volume 5, Issue 1, 2016

Background: Pyrazoles are useful intermediates in pharmaceutical, agrochemical, photographic and other fields. Pyrazole nucleus has been reported to possess a wide spectrum of biological properties such as anti-inflammatory, anti-depressant, anti-bacterial, anti-tumor, anti-microbial, anti-viral, anti-fungal and anti-filarial agent. The aims of this paper to introduce readers the polyvinylsulfonic acid (PVSA) as a new cataly Read More

Background: Nitration of aromatic and hetero aromatic compounds has received enormous attention for the past several decades because many of these nitro products are used as chemical feed stocks and important intermediates for the synthesis of several lifesaving drugs, dyes, pharmaceuticals, perfumes, plastics and explosives. The classical nitration method demands the use of acid mixture (a potent mixture o Read More

Background: The hetero-Diels-Alder (HDA) reaction of the carbonyl compounds with conjugated dienes, sometimes referred to as oxa-DA reaction, is an important method for the preparation of dihydropyrans, which are useful starting materials for the synthesis of several natural products including carbohydrates. However, carbonyl group as such is a less reactive dienophile and usually requires the use of a catalyst to enha Read More

Background: Lipases are excellent biocatalysts with dual ability of hydrolysis as well as esterification with high efficiency and substrate specificity. However, in the pristine form they have inherent limitations such as lack of reusability and limited thermal and pH stability those restrict their uses in commercial applications. These limitations can be overcome by their immobilization on the suitable supports. Methods: In the present Read More

Background: Currently, phase transfer catalysis is an experimental technique which is environmentally benign technique have become immensely popular in promoting various reactions. Methods: The reaction between 4-nitrophenol and propargyl bromide was carried out in a solid-liquid biphasic phase transfer catalytic system using potassium carbonate as base at 40°C. Results: Trace amount of water is introduced to the Read More

Background: Heterogeneous catalysts are the leading areas of research interest mainly due to the facilities of recovery and reusability. Water hyacinth (Eichhornia crassipes) is a renewable aquatic plant and is considered a hazard for other useful aquatic crops. In the search of a sustainable and eco-friendly process, a novel heterogeneous catalyst has been prepared from this plant for the use in the synthesis of bi Read More

Background: The aim of this paper is to introduce about the synthetic strategy of new polyoxometalate compounds using single step reaction procedure and their oxidative catalytic activity. In this context herein, we report green oxidation process for the oxidation of alcohols to carbonyl compounds, using yttrium containing dimeric K11[Y(PW11O39)2]·35H2O (1) and tetrameric K16Na6[(PY2W10O38)4 (W3O8)(OH)4(H2O) Read More