Dimethylformamide → (6S-cis)-1-chloro-N-[2-chloro-5-(6-chlorotetrahydro-1,3-dioxo-1H-pyrrolo[1,2-c]imidazol-2(3H)-yl)-4-fluorophenyl]methanesulfonamide

Participants

Reaction Conditions

Reaction Steps

To a stirred suspension of the title compound of Example 1, Step G (3.3 g, 8 mmol) in 25 mL toluene and 0.02 g DMF was added at 80° C. thionyl chloride (1.31 g, 11 mmol) over a period of 15 minutes. The suspension was stirred at the same temperature for 2 h and at 105° C. for 30 minutes. After cooling to room temperature, the organic layer was washed with water, dried, and the solvent was evaporated under reduced pressure to yield the title compound of Step A, a compound of this invention, in quantitative yield as a crude powdery product melting at 169-170° C. 1H NMR (CDCl3) δ 7.64 (d, 1H), 7.36 (d, 1H), 7.20 (br s, 1H), 4.78 (m, 2H), 4.56 (s, 2H), 4.24 (dd, 1H), 3.62 (dd, 1H), 2.62 (m, 1H), 2.38 (m, 1H).

Provenance & Evidence