A solution of 4-cyano-tert-butyloxycarbonylaniline (2.20 g, 10.0 mmol) in 20 mL of pyridine and 5 mL of TEA was purged with H2S gas for 7.0 h. Solvents were removed under vacuum. The resulting crude 4-Boc-aminobenzene-thiocarboxamide (yellow residue, 70% purity) was used directly in the next step. A solution of 4-Bocamino-benzenethiocarboxamide (205 mg, 70% pure, 0.57 mmol) and 3-(2-bromoacetyl)hydroquinolin-2-one (Example 27b, 78 mg, 0.29 mmol) in 50 mL of MeOH was heated at reflux for 4 h. After cooling to RT, the precipitates were collected by filtration to provide the title compound as an off-white solid. MS m/z: 420.2 (M+1). HRMS m/z: 420.1358 (M+H+, C23H21N3O3S Calc'd 420.1376).
