Brönsted acid catalysts have been used in a number of organic transformations. To
overcome limitations, such as toxicity, volatility, high price and hazardous nature of the …

This review discusses the advances in the use of silica-supported polyphosphoric acid (PPA-
SiO2) as a green and reusable heterogeneous catalyst in the preparation of various organic …

Herein we report an alternative eco-friendly method for the synthesis of 1, 2, 3, 4-
tetrahydroisoquinoline sulfonamide derivatives. All obtained compounds were screened for …

5-Aryloxazolidines react with arenes under Lewis or Brønsted acid conditions via the Friedel–
Crafts/Pictet–Spengler double alkylation sequence to give alkaloid-like 4 …

The development of new protocols using non‐toxic, low cost, eco‐friendly, recyclable
catalyst systems which give high productivity under mild reaction conditions has received …

Novel photochromic 1-vinylidene-naphtho [2, 1-b] furan derivatives (VNF-1 and VNF-2) were
successfully anchored onto silica nanoparticles (SiO2 NPs) through direct adsorption …

A practical, efficient and general method was developed for the deprotection of a variety of
aromatic and aliphatic acetals to their corresponding catechol or diol derivatives using thiol …

The objective of this tutorial review is to summarize some of the recent advances in a
specific class of silica based multifunctional, heterogeneous catalysis. We are focusing on …

Oxindoles owns antibacterial, antiprotozoal, and anti-inflammatory activities and have been
patented as agonists to progesterone receptors [1]. The naturally occurring oxindole …

The compound named in the title was prepared from N 1, N 4-diphenethylterephthalamide 1.
The resulting bis terephthalamide was subjected to an intramolecular α-amidoalkylation …