The present invention regards an improved and industrially advantageous process for the preparation of the 2-hyaroxy-4-phenyl-3,4-dihydro-2H-chromen-6-yl-methanol intermediates, also called "feso chromenyl" and (R)-2-[3-(diisopropylamino)-l- phenylpropyl]-4-(hydroxymethyl)phenol, also called "(R)-feso deacyl", which are in turn used in the synthesis of fesoterodine and in particular of fesoterodine furnarate. This process utilises reagents which are non-toxic and manageable at industrial level and enables obtaining a new stable and non-hygroscopic crystalline form of the key intermediate "(R)-feso deacyl", called form B.
本发明涉及一种改进和具有工业优势的制备2-羟基-4-苯基-3,4-二氢-2H-
香豆素-6-
甲醇中间体的方法,也称为“费索
香豆素基”和(R)-2-[3-(
二异丙基氨基)-1-苯基丙基]-4-(羟甲基)
苯酚,也称为“(R)-费索去酰基”,这些中间体又用于合成费索罗丁和特别是费索罗丁
富马酸盐。本方法利用非毒性且可在工业
水平上管理的试剂,使得能够获得“(R)-费索去酰基”的新稳定且不吸湿的晶体形式B。