Reaktion #1332302

Reaktionsgleichung

(2S)-(2-amino-5-chloro-benzoylamino)-3-(2′-phenoxy-biphenyl-4-yl)-propionic acid

(2S)-amino-3-(2′-phenoxy-biphenyl-4-yl)-propionic acid methyl ester

4-(methylthio)phenylboronic acid

triethyl amine

2-amino-5-chlorobenzoic acid

→

2-[5-chloro-2-(4-methylsulfanyl-phenylamino)-benzoylamino]-3-(2′-phenoxy-biphenyl-4-yl)-propionic acid methyl ester

Ausbeute 39.0%

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe crude product was purified by flash column chromatography on silica gel

Vorschrift

A solution of (2S)-(2-amino-5-chloro-benzoylamino)-3-(2′-phenoxy-biphenyl-4-yl)-propionic acid (0.154 g, 0.307 mmol), prepared by reacting (2S)-amino-3-(2′-phenoxy-biphenyl-4-yl)-propionic acid methyl ester and 2-amino-5-chlorobenzoic acid by the general procedure A) was reacted with 4-(methylthio)phenylboronic acid (0.130 g, 0.768 mmol), copper acetate (0.084 g, 0.460 mmol), and triethyl amine (0.215 mL, 1.535 mmol) by the general procedure G. The crude product was purified by flash column chromatography on silica gel using DCM (+25% hexane) to give 0.075 g (39%) of 2-[5-chloro-2-(4-methylsulfanyl-phenylamino)-benzoylamino]-3-(2′-phenoxy-biphenyl-4-yl)-propionic acid methyl ester as a colorless oil. This ester was treated with LiOH (0.019 g, 0.441 mmol) by the general procedure I to give 0.049 g (92%) of 2-[5-chloro-2-(4-methylsulfanyl-phenylamino)-benzoylamino]-3-(2′-phenoxy-biphenyl-4-yl)-propionic acid. LCMS: 610 (M+1)+. 1H NMR (CDCl3) 8.94 [bs, 1H], 7.49 [d, 2H], 7.47 [d, 1H], 7.22 [m, 10H], 7.06 [d, 2H], 6.99 [d, 2H], 6.88 [d, 2H], 6.50 [d, 1H], 4.99 [m, 1H], 3.30 [m, 2H], 2.45 [s, 3H].

Quelle