Browsing by Subject "ring opening"
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o-Phenylene halocarbenonitrenes and o-phenylene chlorocarbenocarbene: A combined experimental and computational approach (2005)Computations find that o-phenylene(halo)carbenonitrenes 2-XN, X = F, Cl, Br, have quinoidal singlet biradical ground states such as the parent o-phenylenecarbenonitrene (2-HN). Compared to the parent 2-HN, halogen substitution ...
Transformation of 2-(4-chloro-5H-1,2,3-dithiazol-5-ylideneamino)-6-ethoxy-4-phenylpyridine-3,5-dicarbonitrile into 4-aminopyrido[2,3-d]pyrimidines and 2-(pyrid-2-yl)guanidines (2015)The reactions of 2-(4-chloro-5H-1,2,3-dithiazol-5-ylideneamino)-6-ethoxy-4-phenylpyridine-3,5-dicarbonitrile (14) with a range of primary and secondary amines are investigated. Treatment with n-BuNH2 and BnNH2 gave ...