P. Srinivasu

AN EFFICIENT AND REGIOSELECTIVE OXYBROMINATION OF AROMATIC COMPOUNDS USING POTASSIUM BROMIDE AND OXONE

ABSTRACT A simple, efficient and regioselective method for oxybromination of aromatics is reported. The electrophilic substitution of bromine generated in situ from potassium bromide using oxone® as an oxidant for the first time. *IICT Communication No. 4708

HIGHLY EFFICIENT, PARA-SELECTIVE OXYCHLORINATION OF AROMATIC COMPOUNDS USING POTASSIUM CHLORIDE AND OXONE*

ABSTRACT A highly efficient, regioselective method for oxychlorination of aromatic compounds is possible through electrophilic substitution of chlorine generated in situ from KCl as a chlorine source and Oxone® as an oxidant for the first time. *HCT Communication No. 4580.

Novel Bromination Method for Anilines and Anisoles Using NH4Br/H2O2 in CH3COOH

Abstract A simple, efficient, regioselective, environmentally safe, and economical method for the oxybromination of anilines and anisoles without catalyst is reported. The electrophilic substitution of bromine generated in situ from ammonium bromide as a bromine source and hydrogen peroxide as an oxidant for the first time. #IICT Communication No. 01/X/07.

Liquid phase acylation of amines with acetic acid over HY zeolite

Alkyl, aryl and heterocyclic amines are efficiently converted to the corresponding amides with acetic acid over HY zeolite; the catalyst can be re-used with no loss of activity.

Fast and efficient synthesis of ZSM-5 under high pressure

Abstract Highly crystalline ZSM-5 catalysts were synthesized in 4–6 h of autoclavation time using various solvents under high pressures (∼40–60 atm ) and temperatures (230–250 °C)

Regioselective oxyiodination of aromatic compounds using potassium iodide and oxone

ABSTRACT A highly efficient, simple, mild and regioselective method for oxyiodination of aromatic compounds is reported. The electrophilic substitution of iodine generated in situ from KI as an iodine source and oxone® as an oxidant for the first time. *IICT Communication No. 4786

Liquid Phase Regioselective Bromination of Aromatic Compounds Over Hzsm-5 Catalyst

Abstract A simple, efficient, regioselective and environmentally safe method for oxybromination of activated aromatics catalyzed by HZSM-5 is reported. The electrophilic substitution of bromine generated from KBr using HZSM-5 as a catalyst and H2O2 as an oxidant.

Liquid Phase Acylation of Alcohols with Acetic Acid Over Zeolites

Abstract The liquid phase acylation of primary and secondary alcohols were carried out with acetic acid in the presence of zeolites. LaY zeolite is found to be the best catalyst.

23-P-24 - Oxyhalogenation of aromatic compounds in pressence of KCl or KBr and H2O2 over zeolites

Publisher Summary This chapter discusses the oxychlorination and oxybromination reactions of aromatic compounds carried out over modified Y and ZSM-5 zeolites in presence of potassium chloride (KCl) or potassium bromide (KBr), and hydrogen peroxide (H2O2). The process is facile and ecofriendly and the catalyst can be reused. In the oxychlorination of phenol, the yields of para chloro and ortho chloro phenol are 63.0% and 22.0% at 85% conversion, over CeZSM-5(30) catalyst. CeZSM-5 is a better catalyst for oxychlorination compared to HZSM-5 and modified Y zeolites. In the oxybromination of aniline, the yields of para bromo and ortho bromo aniline are 76.0% and 15.0%, respectively at 91.0% conversion over HZSM-5 catalyst in presence of KBr and H2O2.

Fast and efficient synthesis of zeolites under high pressures

Abstract Highly crystalline ZSM-5 catalysts were synthesized in 4–10 h of autoclavation time using various solvents. The autogeneous pressures were in the range of 20 to 60 atm. The autoclavation temperatures were in the range of 180 to 250°C. The surface areas varied in the range of 340 to 387 m2g−1. The catalysts were characterized by XRD, IR, sorption, solid-state MAS-NMR and catalytic reactions.