A Selective, Expeditious and Sustainable Entry en Route to Benzopyrazines and bis-Benzopyrazines

Author(s): Debasish Bandyopadhyay, Sanghamitra Mukherjee, Bimal K. Banik

Journal Name: Combinatorial Chemistry & High Throughput Screening
Accelerated Technologies for Biotechnology, Bioassays, Medicinal Chemistry and Natural Products Research

Volume 18 , Issue 1 , 2015

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A convenient green synthesis of benzopyrazines and bis-benzopyrazines has been performed by the condensation of diversely substituted diamines and dicarbonyl compounds in water using indium powder as catalyst under controlled microwave exposure. The effects of microwave power, and temperature on this reaction are investigated in detail to identify the best condition. A wide range of diversely substituted diamines and dicarbonyl compounds produce excellent yield of the corresponding benzopyrazines and bis-benzopyrazines. A comparative study has also been made between microwave-induced procedure and conventional method. The present method is atom-economical, environmentally friendly, and affords synthetically useful and challenging products very rapidly.

Keywords: Aqueous, benzopyrazine, green chemistry, indium, microwave, nitrogen heterocycles, quinoxaline.

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Article Details

Year: 2015
Published on: 13 February, 2015
Page: [53 - 62]
Pages: 10
DOI: 10.2174/1386207318666150131125053

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PDF: 43