反応 #57660

反応方程式

(S)-2-{4′-[(5-chloro-4-isopropoxy-3-methyl-benzofuran-2-carbonyl)-amino]-biphenyl-4-sulfonylamino}-3-methyl-butyric acid tert-butyl ester

TFA dichloromethane

→

(S)-2-{4′-[(5-chloro-4-isopropoxy-3-methyl-benzofuran-2-carbonyl)-amino]-biphenyl-4-sulfonylamino}-3-methyl-butyric acid

収率 82.0%

反応条件

後処理

1. 1
   その他the solvents were removed under vacuum
2. 2
   その他the residue was triturated with acetonitrile
3. 3
   その他The mixture was freeze-dried

実験手順

To 160 mg of (S)-2-{4′-[(5-chloro-4-isopropoxy-3-methyl-benzofuran-2-carbonyl)-amino]-biphenyl-4-sulfonylamino}-3-methyl-butyric acid tert-butyl ester was added 3 mL of TFA/dichloromethane (1:1) and the solution was stirred at room temperature for 9 h. When the reaction was done, the solvents were removed under vacuum and the residue was triturated with acetonitrile. The mixture was freeze-dried to yield 120 mg (77% yield) of (S)-2-{4′-[(5-chloro-4-isopropoxy-3-methyl-benzofuran-2-carbonyl)-amino]-biphenyl-4-sulfonylamino}-3-methyl-butyric acid as a white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 0.8 (dd, J=12.4, 6.8 Hz, 6 H) 1.3 (d, J=6.1 Hz, 6 H) 1.9 (m, 1 H) 2.7 (s, 3 H) 3.6 (dd, J=9.3, 6.1 Hz, 1 H) 4.7 (m, 1 H) 7.5 (d, J=8.8 Hz, 1 H) 7.6 (m, 1 H) 7.8 (d, J=8.8 Hz, 2 H) 7.9 (m, 4 H) 8.0 (d, J=8.8 Hz, 2 H) 8.1 (d, J=9.3 Hz, 1 H) 10.6 (s, 1 H) 12.6 (s, 1 H).

出典