- PROCESS FOR THE PREPARATION OF 2-HYDROXY-4-PHENYL-3,4-DIHYDRO-2H-CHROMEN-6-YL-METHANOL AND (R)-FESO-DEACYL
-
The present invention regards an improved and industrially advantageous process for the preparation of the 2-hydroxy-4-phenyl-3,4-dihydro-2H-chromen-6-yl-methanol intermediates, also called “feso chromenyl” and (R)-2-[3-(diisopropylamino)-1-phenylpropyl]-4-(hydroxymethyl)phenol, also called “(R)-feso deacyl”, which are in turn used in the synthesis of fesoterodine and in particular of fesoterodine fumarate. 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.
- -
-
Paragraph 0072
(2013/04/10)
-
- PROCESS FOR THE PREPARATION OF 2 -HYDROXY- 4 -PHENYL -3, 4 -DIHYDRO-2H-CHROMEN- 6 -YL -METHANOL AND (R) - FESO - DEACYL
-
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.
- -
-
Page/Page column 16-17
(2012/01/05)
-
- SELECTIVE DESILYLATION OF PHENOLIC AND ALCOHOLIC TRIMETHYLSILYL ETHERS
-
A quaternary ammonium resin ( phenolated HO form ) and a carboxylate resin ( H form ) will selectively remove phenolic and alcoholic trimethylsilyl group, respectively, under controlled conditions.
- Kawazoe, Yutaka,Nomura, Makoto,Kondo, Yumiko,Kohda, Kohfuku
-
p. 4307 - 4310
(2007/10/02)
-