Hydrogen Sulfide → 4'-[[3(R)-[(3-t-Butoxycarbonylamino-3-methyl-1-oxobutyl)amino]-2,3,4,5-tetrahydro-2-oxo-1H-1-benzazepin-1-yl]methyl][1,1'-biphenyl]-2-thioamide

Participants

Reaction Conditions

Reaction Steps

A solution of 380 mg (0.67 mmol) of 3-[[1-[[2'-cyano-[1,1'-biphenyl]-4-yl]methyl]-2,3,4,5-tetrahydro-2-oxo-1H-benzazepin-3(R)-yl]amino]-1,1-dimethyl-3-oxopropylcarbamic acid, 1,1-dimethylethyl ester (Example 69, Step D), in 5 mL of pyridine was placed in a bomb and treated with 5 mL of triethylamine and excess hydrogen sulfide was introduced under pressure. The bomb was sealed and heated for 12 hours at 90° C. The bomb was vented into 5 M sodium hydroxide and the contents poured into 40 mL of water, then extracted with ether (3×). The combined extracts were washed with water (3×), dried over magnesium sulfate, filtered and evaporated under vacuum to afford 330 mg (0.53 mmol, 82%) of product. 1H NMR (200 MHz,CDCl3): 1.38 (s,6H), 1.45 (s,9H), 1.90 (m,1H), 2.4-2.7 (m,4H), 2.92 (m,1H), 4.55 (m,1H), 4.94 (d,15 Hz,1H), 5.22 (d,15 Hz,1H), 5.31 (br s,1H), 6.50 (br s,1H), 6.70 (m,1H), 7.1-7.5 (m,12H), 7.82 (m,1H). FAB-MS (Li+ spike): calculated for C34H40N4O4S 600; found 607 (M+Li,65%).

Provenance & Evidence