The present invention concerns a process for preparing a compound having the Formula A; or a pharmaceutically acceptable salt or derivative thereof, or for preparing a substituted urea compound of Formula IIa, or a pharmaceutically acceptable salt or ester thereof, the process comprising the reaction of an imidazolyl intermediate of Formula IIa′ with a carbamoyl halide of the formula: R1R2NC(═O)Hal, wherein Hal represents Cl, F, I or Br, wherein the intermediate of Formula IIa′ is prepared by oxidation of the derivative of R5 and R6, R6-C(═O)CH2R5 to form a glyoxal intermediate R6-C(═O)(C═O)R5, which is subjected to treatment with ammonium hydroxide and an aldehyde R8CHO to provide the intermediate of Formula IIa′ and wherein the compound substituents are as defined herein.
本发明涉及一种制备具有式A的化合物或其药学上可接受的盐或衍
生物的工艺,或制备式IIa的取代
脲化合物或其药学上可接受的盐或酯的工艺,该工艺包括式IIa′的
咪唑中间体与式的
氨基甲
酰卤反应:R1R2NC(═O)Hal,其中Hal代表Cl、F、I或Br,式Ⅱa′的中间体是由R5和R6的衍
生物R6-C(═O)CH2R5氧化制备成
乙二醛中间体R6-C(═O)(C═O)R5、经氢氧化
铵和醛 R8CHO 处理,得到式 IIa′的中间体,其中化合物取代基如本文所定义。