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Abstract
2-Amino-3(4,5-dihydro-1H-imidazol-2-yl)thieno[2,3-b]quinoxaline 2 was prepared and then allowed to react with nitrous acid, triethyl orthoformate. acetic anhydride and carbon disulfide to give the imidazotriazinothienoquinoxaline 3 and imidazopyrimidothienoquinoxaline 4–6 respectively. Starting with thione 6 a series of S-ubstituted mercapto derivatives 7–10 was obtained. Reaction of 2-amino-3-carbonitrile-thieno[2,3-b]quinoxaline 1 with acrylonitrile, malononitrile andor arylidine malononitrile gave pyridothienoquinoxaline derivatives 11-13.
Published Version
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