On September 8, 2005, Arora, Nidhi; Billedeau, Roland Joseph; Dewdney, Nolan James; Gabriel, Tobias; Goldstein, David Michael; O’Yang, Counde; Soth, Michael published a patent.Electric Literature of 85426-79-5 The title of the patent was Preparation of fused pyrazolo pyrimidine and pyrazolo pyrimidinone derivatives as p38 kinase inhibitors. And the patent contained the following:
The title compounds I-III [R1 = (hetero)aryl, aralkyl, cycloalkyl; R2 = (hetero)aryl, cycloalkyl, alkyl, heterocyclyl; R3 = H, alkyl; R4 = H, alkyl, OH, etc.; R5 = H, alkyl, heteroalkyl, etc.; X, Y = N, or one of X and Y = N and the other = CR6 (R6 = H, alkyl, OH, etc.); Z = N, CR6; W = O, SOm, CH2, (un)substituted NH; m = 0-2; A = O, CH2, SOm, C(O), etc.; B = O, SOm, C(O), etc.; k = 0-1], useful in treating p38 mediated disorders, were prepared and formulated. E.g., a multi-step synthesis of (S)-IV, starting from 4,6-dichloro-2-(methylthio)pyrimidine and 2-chlorobenzaldehyde, was given. The compounds I were found to be inhibitors of p38 MAP kinase. IV showed a p38 IC50 of 0.004 μM. The experimental process involved the reaction of 4-Chloro-6-(methylthio)-1H-pyrazolo[3,4-d]pyrimidine(cas: 85426-79-5).Electric Literature of 85426-79-5
The Article related to fused pyrazolo pyrimidine pyrimidinone preparation p38 kinase inhibitor, pyrazolopyrimidine preparation p38 kinase inhibitor, pyrazolopyrimidinone preparation p38 kinase inhibitor and other aspects.Electric Literature of 85426-79-5
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics