C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 498/04 (2006.01) A01N 43/90 (2006.01) C07C 275/34 (2006.01) C07C 275/40 (2006.01) C07C 281/08 (2006.01) C07C 337/08 (2006.01) C07D 249/00 (2006.01) C07D 273/00 (2006.01) C07D 285/00 (2006.01) C07D 487/04 (2006.01) C07D 513/04 (2006.01)
Patent
CA 2336468
The invention relates to a method for producing anellated triazoles, according to which substituted N-aminoureas are reacted with formaldehyde or paraformaldehyde to obtain the corresponding methylene-imine compounds and these are then cyclized in the presence of catalytic quantities of acid or in the presence of a metal oxide to tetrahydro-4H-1,3,4-ox(or thia)diazines, after which the anellated triazoles are prepared using phosgene or a phosgene substitute. The invention also relates to new anellated triazoles obtained using the method provided for by the invention.
L'invention concerne un procédé de préparation de triazols annelés, selon lequel on fait d'abord réagir des N-amino-urées substituées avec du formaldéhyde ou de paraformaldéhyde, pour obtenir les composés méthylène-imino correspondants. Ces derniers sont ensuite cyclisés en présence de quantités catalytiques d'acide ou en présence d'un oxyde de métal, pour former des tétrahydro-4H-1,3,4-ox(ou thia)diazines. Pour finir, les triazols annelés sont préparés avec du phosgène ou en substitut de phosgène. L'invention concerne en outre des triazols annelés obtenus selon ledit procédé.
Hamprecht Gerhard
Menke Olaf
Otten Martina
Reinhard Robert
Schafer Peter
Basf Aktiengesellschaft
Robic
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