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- W2012137175 abstract "2‐Aza‐1,3‐dienes. Access to N ‐Aminoimidazoles, 3 H ‐Pyrroles, [1,2,4]Triazolo[1,5‐ a ]pyrazines, or Imidazo[1,2‐ a ]pyrazines Nucleophilic attack of 5‐(dialkylamino)‐2‐aza‐1,3‐diene‐1,1‐dicarbonitriles (or their 1‐methoxycarbonyl analogous) by hydrazines or hydrazdes gives substituted N ‐aminoimidazoles, [1,2,4]triazolo‐[1,5‐ a ]pyrazines, or α‐dihydrazino derivatives. With α‐amino esters (or analogous), imidazo[1,2‐ a ]pyrazines are produced. Addtion of cyanide anions occurs also with formation of substituted 3 H ‐pyrroles. Structures and rationalisation of this nucleophilic attack are discussed." @default.
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- W2012137175 date "1987-02-04" @default.
- W2012137175 modified "2023-10-16" @default.
- W2012137175 title "Aza-2-dienes-1,3. Partie 5. Préparation de<i>N</i>-aminoimidazoles, 3<i>H</i>-pyrroles, triazolo[1,2,4][1,5-<i>a</i>]pyrazines et imidazo[1,2-<i>a</i>]pyrazines" @default.
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- W2012137175 doi "https://doi.org/10.1002/hlca.19870700123" @default.
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