Events The 16th International Electronic Conference on Synthetic Organic Chemistry

Event submissions

Published

This submission belongs to the session a. General Organic Synthesis of the event The 16th International Electronic Conference on Synthetic Organic Chemistry

Published date

30 Oct, 2012

Citation

M. Sameiro T. Gonçalves, Paulo J. G. Coutinho, Diogo M. F. Sampaio, B Rama Raju, Ultrasonic Mediated Synthesis of New Benzo[a]phenoxazinium Chlorides and Their Photophysical Studies, in Proceedings of The 16th International Electronic Conference on Synthetic Organic Chemistry, 1 November–30 November 2012, MDPI: Basel, Switzerland, doi: 10.3390/ecsoc-16-01112

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Ultrasonic Mediated Synthesis of New Benzo[a]phenoxazinium Chlorides and Their Photophysical Studies

B Rama Raju ^1,2

Diogo M. F. Sampaio ¹

Paulo J. G. Coutinho ¹

M. Sameiro T. Gonçalves ¹

1. Centro de Física, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal

2. Centro de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal

Abstract

Ultrasonic irradiation was demonstrated to be an efficient technique for activating various organic transformations with short reaction times, fast reaction rate, high yields and sometimes good selectivity. Four new benzo[a]phenoxazinium chlorides possessing isopentylamino, (2-cyclohexylethyl)amino and phenethylamino groups at 5-position of the heterocyclic system were efficiently synthesised under ultrasound irradiation. Conventional heating procedure revealed that the present ultrasonic method provided several advantages in terms of reaction times and product yields. Photophysical studies in ethanol and water, as well as acid-base equilibrium studies of the probes were carried out.

Keywords

Benzo[a]phenoxazines

ultrasonic irradiation

conventional heating

acid-base equilibrium

Microwave Assisted Synthesis of Coumarocoumarins

Microwave Assisted Synthesis of Dendrimeric Cores