[EN] PROCESS FOR PREPARATION OF 2-(6-NITROPYRIDIN-3-YL)-9H-DIPYRIDO[2,3-B;3',4'-D]PYRROLE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 2- (6-NITROPYRIDIN-3-YL) -9H-DIPYRIDO [2,3-B; 3', 4'-D] PYRROLE
申请人:HOFFMANN LA ROCHE
公开号:WO2018046428A1
公开(公告)日:2018-03-15
The present invention relates to a process for preparation of the compound of formula (I) which processes comprise: a) coupling a compound of formula (2), wherein a leaving group O-SO2-R is selected from the triflate group, the tosylate group, the mesylate group, the besylate group, the nosylate group or the brosylate group, with a suitable boronic acid, a trifluoroborate or a boronic acid ester under argon condition and in the presence of a catalyst and a base in a suitable solvent and then isolating the product as an acid addition salt to afford the compound of formula (Ia) and b) converting the acid addition salt of formula (Ia) wherein the acid HX comprises suitable organic or inorganic acids into the compound of formula (I) by treatment with at least a stoichiometric equivalent of a suitable base.
本发明涉及一种制备公式(I)化合物的方法,这些方法包括:a)在氩气条件下,以适当的溶剂中,并在催化剂和碱的存在下,将含有离去基团O-SO2-R的公式(2)化合物与适当的硼酸、三氟硼酸盐或硼酸酯偶联,离去基团O-SO2-R选自三氟甲磺酸酯基团、对甲苯磺酸酯基团、甲磺酸酯基团、苯磺酸酯基团、硝基磺酸酯基团或溴磺酸酯基团,然后隔离产物作为酸加成盐以得到公式(Ia)的化合物;b)通过使用至少化学计量当量的适当碱进行处理,将含有酸HX的公式(Ia)的酸加成盐转化为公式(I)的化合物,其中酸HX包括适当的有机酸或无机酸。