tert-butyl N-[(3S,4S)-3-amino-1,1-dioxothian-4-yl]carbamate

Conditions: temp:150.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of Hunig's base (2.69 ml, 15.4 mmol), 3-bromo-5-fluoropyridine-2-carbonitrile (1.55 g, 7.69 mmol), tert-butyl rel-[(3S,4S)-3-amino-1,1-dioxidotetrahydro-2H-thiopyran-4-yl]carbamate (2.51 g, 9.50 mmol) in NMP (8 ml) was heated to 150° C. for 30 minutes. The reaction mixture was diluted with water (50 mL) and stirred. The reaction mixture was filtered, and the collected solids were washed with cold water. The solids were dried under reduced pressure to afford tert-butyl rel-{(3S,4S)-3-[(5-bromo-6-cyanopyridin-3-yl)amino]-1,1-dioxidotetrahydro-2H-thiopyran-4-yl}carbamate. MS ESI calc'd. for C16H22BrN4O4S [M+H]+ 445 and 447. found 445 and 447. The reaction mixture was filtered the collected solids were washed with cold water The solids were dried under reduced pressure