Process for preparing 5-[2-ethoxy-5-(4-methylpiperazin-1-yl sulfonyl)phenyl]-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]-pyrimidin-7-one and intermediates for this preparation process

摘要

Zp sob v²roby 5-[2-ethoxy-5-(4-methylpiperazin-1-ylsulfonyl)fenyl]-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-onu vzorce I, p°i n m se cyklizuje slou enina vzorce II, za bazick²ch, neutr ln ch nebo kysel²ch podm nek. Meziprodukty pro tento zp sob vzorce II a V./