Reaction of 2,3-dichloro-5,6-dicyanopyrazine with enamines and some tertiary amines |
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Authors: | Dongfeng Hou Atsushi Oshida Masaru Matsuoka |
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Abstract: | The reaction of 2,3-dichloro-5,6-dicyanopyrazine ( 1 ) with enamines as well as a few tertiary amines as enamine precursors was investigated. Both reactions gave aminovinyl-substituted pyrazine derivatives. During the attempted purification of 3c or 3d by column chromatography on silica gel, 2-chloro-5,6-dicyano-3-(1′-oxocyclopent-2′-yl)pyrazine ( 4 ) was obtained, apparently by hydrolytic cleavage. The products prepared are all of interest as potential pesticides. |
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