Reactions of β-sulfenyl α,β-unsaturated ketones with guanidine,Amidines, and diamines |
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Authors: | Takehiko Nishio Tatsuhiro Tokunaga Yoshimori Omote |
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Abstract: | β-Sulfenyl α, β-unsaturated ketones 1a-c reacted with guanidine or amidines to give pyrimidine derivatives 3 in 14-76% yields. Treatment of ketones 1 with diamines such as ethylenediamine and o -phenylenediamine afforded the seven-membered heterocycles, 2,3-dihydro-1,4-diazepine 5 and 2,3-benzo-1,4-diazepines 8a-c . |
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