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Balanagar, India

Ramineni S.,Chalapathi Institute of Engineering and Technology | Kannasani R.K.,RA Chemical Pharma Ltd. | Kalikinidi N.R.,Indian Institute of Chemical Technology
Der Pharma Chemica | Year: 2016

DL-10-Camphorsulfonic acid (CAS. No- 5872-088-2) was found to be a convenient catalyst for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones through a one-pot three-component reaction of aldehydes, alkyl acetoacetate, and urea at 80°C under solvent-free conditions. Source


Ramineni S.,Chalapathi Institute of Engineering and Technology | Kannasani R.K.,RA Chemical Pharma Ltd. | Peruri V.V.S.,Acharya Nagarjuna University
Green Chemistry Letters and Reviews | Year: 2014

A simple and efficient method has been developed for the synthesis of benzoxazoles from 2-aminophenol and substituted aldehydes in the presence of a catalytic amount of zinc triflate in ethanol solvent at reflux temperature. © 2014 The Author(s). Published by Taylor & Francis. Source


Srinivasulu R.,Chalapathi Institute of Engineering and Technology | Satyanarayana P.V.V.,Acharya Nagarjuna University | Ravi Kumar K.,RA Chemical Pharma Ltd.
Russian Journal of General Chemistry | Year: 2013

Treatment of tetrahydropyranyl (THP) ethers with zinc triflate in methanol provides a simple and efficient process for deprotection of these ethers and the parent alcohols are obtained in excellent yields. © 2013 Pleiades Publishing, Ltd. Source


Kumar K.R.,RA Chemical Pharma Ltd. | Satyanarayana P.V.V.,Acharya Nagarjuna University | Reddy B.S.,RA Chemical Pharma Ltd.
Chinese Journal of Chemistry | Year: 2012

Tetrahydropyranyl (THP) ethers have been efficiently and simply deprotected by using Silica supported sodium hydrogen sulphate (NaHSO 4-SiO 2) in methanol at room temperature to regenerate the parent alcohols in high yields. Tetrahydropyranyl (THP) ethers have been efficiently and simply deprotected by using silica supported sodium hydrogen sulphate (NaHSO 4-SiO 2) in methanol at room temperature to regenerate the parent alcohols in high yields. © 2012 SIOC, CAS, Shanghai & WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Ravi Kumar K.,RA Chemical Pharma Ltd. | Satyanarayana P.V.V.,Acharya Nagarjuna University | Srinivasa Reddy B.,RA Chemical Pharma Ltd.
Asian Journal of Chemistry | Year: 2012

A Simple and efficient process for tetrahydropyranylation of alcohols and phenols has been developed by reacting with dihydropyran at room temperature in presence of catalytic amount of silica supported sodium hydrogen sulphate. Source

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