Sulfathiazole → (s)-2-(Tert-butyldiphenylsilyloxy)-4-hydroxy-n-[(4-(n-thiazol-2-ylsulfamoyl)phenyl)]butanamide

Participants

Reaction Steps

Synthesized according to General Procedure 5. The reaction was set up with sulfathiazole (11.2 g, 44 mmol), CH2Cl2 (150 mL), trimethylaluminum (2.0 M in hexanes, 22 mL, 44 mmol), and (S)-3-(tert-butyldiphenylsilyloxy)dihydrofuran-2(3H)-one (12.6 g, 37 mmol) in CH2Cl2 (10 mL). Purification by silica gel chromatography (10% MeOH in DCM) afforded the desired amide as a white solid (22 g, 84% yield). 1H-NMR (400 MHz, DMSO-d6) δ 8.73 (s, 1H), 7.76 (dd, J=1.8, 7.0 Hz, 1H), 7.74 (s, 1H), 7.59-7.53 (m, 4H), 7.44-7.28 (m, 8H), 7.09 (d, J=4.6 Hz, 1H), 6.46 (d, J=4.6 Hz, 1H), 4.34 (dd, J=4.1, 6.7 Hz, 1H), 3.64-3.59(m, 1H), 3.54 (dd, J=6.1, 11.4 Hz, 1H), 1.99-1.91 (m, 1H), 1.81-1.70 (m, 1H), 1.10 (s, 9H). LC/MS (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)), m/z: M+1 obs=596.5; tR=1.93 min.

Provenance & Evidence