Reaktion #308913

Reaktionsgleichung

(R)-2-[(R)-2-(5-bromo-2-fluoro-phenyl)-2-(2-nitro-benzenesulfonylamino)-propoxy]-3,3,3-trifluoro-2-methyl-propionic acid ethyl ester

NH3

→

title compound

(R)-2-[(R)-2-(5-Bromo-2-fluoro-phenyl)-2-(2-nitro-benzenesulfonylamino)-propoxy]-3,3,3-trifluoro-2-methyl-propionamide

Lösungsmittel

MeOH

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe solvent was removed under reduced pressure
2. 2
   Sonstigethe residual solid re-crystallized from Et2O

Vorschrift

A solution of (R)-2-[(R)-2-(5-bromo-2-fluoro-phenyl)-2-(2-nitro-benzenesulfonylamino)-propoxy]-3,3,3-trifluoro-2-methyl-propionic acid ethyl ester (26.6 g, 44.2 mmol) in 7N NH3 in MeOH (75 ml) was stirred for 16 h at 50° C. The solvent was removed under reduced pressure and the residual solid re-crystallized from Et2O to give the title compound as yellow crystals: TLC (hexane-EtOAc 1:1): Rf=0.35; HPLC RtH5=1.184 min; ESIMS: 589, 591 [(M+NH4)+]; 1H NMR (360 MHz, CDCl3): δ 7.85 (d, 1H), 7.64 (m, 3H), 7.44 (d, 1H), 7.41 (dd, 1H), 7.26 (m, 1H), 6.68 (br s, 1H), 6.57 (dd, 1H), 6.19 (s, 1H), 5.54 (br s, 1H), 4.24 (d, 1H), 3.93 (d, 1H), 1.79 (s, 3H), 1.67 (s, 3H).

Quelle