- On triazoles XLV [1]. Synthesis of 5,7-diamino-1,2,4-triazolo[1,5-a][1,3,5]triazines
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The reaction of differently substituted 5-amino-1,2,4-triazoles (5) with isothiourea derivatives (3) to yield isomeric 5,7-diamino-1,2,4-triazolo[1,5-a][1,3,5]triazines (6 and 7), previously described as not proceeding in melt, was performed in different solvents as well as in the melt at 150-160°. It was proved that the above reaction had rather general validity. The structure of isomers 6 and 7 were proved spectroscopically. The structure of 6/5 (Q = ethylamino) was corroborated with single crystal X-ray diffraction determination, as well.
- Berecz, Gabor,Pongo, Laszlo,Koevesdi, Istvan,Reiter, Jozsef
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p. 327 - 334
(2007/10/03)
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- First synthesis of 4-substituted benzenesulfonylcyanoguanidines
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N'-substituted-N-cyano-S-methylcarbamimidothioates react with 4-substituted benzene sulfonamides to give the corresponding sulfonylcyanoguanidines.
- Masereel, Bernard,Lebrun, Philippe,Dogne, Jean Michel,De Tullio, Pascal,Pirotte, Bernard,Pochet, Lionel,Diouf, Ousman,Delarge, Jacques
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p. 7253 - 7254
(2007/10/03)
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