C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 487/04 (2006.01)
Patent
CA 2442061
The present invention relates to a process for preparing 4,6-diaminopyrimido[5,4--d]pyrimidines of formula I, (see formula I) wherein R1 to R4 have the meanings given in claim 1, as well as new intermediate products which are involved in this process.
La présente invention concerne un procédé de production de 4,6-diaminopyrimido[5,4-d]pyrimidines de formule (I), dans laquelle R?1¿ à R?4¿ ont les significations énoncées dans la revendication 1. La présente invention concerne également de nouveaux produits intermédiaires qui sont mis en oeuvre au cours dudit procédé.
Belzer Werner
Lock Ralf
Rall Werner
Boehringer Ingelheim Pharma Gmbh & Co. Kg
Fetherstonhaugh & Co.
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