tert-butyl 2-isothiocyanatoacetate

Conditions: temp:-75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (S)-3-[[(t-butyloxy)carbonyl]amino]-2-azetidinone (186 mg, 1 mmol) in 6 ml of dry tetrahydrofuran at -75° C. was treated with 0.65 ml (1.1 mmol) of 1.68N n-butyl lithium. After 30 minutes, a solution of t-butyl isothiocyanatoacetate (0.17 ml, 1.1 mmol) in 1 ml of dry tetrahydrofuran was added to the reaction mixture. After stirring at -75° C. for 2 hours, the reaction mixture was placed at -70° C. overnight. the reaction mixture was placed at -70° C. overnight

Conditions: temp:-75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of (S)-3-[[(t-butyloxy)carbonyl]amino]-2-azetidinone (186 mg, 1 mmol) in 6 ml of dry tetrahydrofuran at -75° C. was treated with 0.65 ml (1.1 mmol) of 1.68N n-butyl lithium. After 30 minutes, a solution of t-butyl isothiocyanatoacetate (0.17 ml, 1.1 mmol) in 1 ml of dry tetrahydrofuran was added to the reaction mixture. After stirring at -75° C. for 2 hours, the reaction mixture was placed at -70° C. overnight. the reaction mixture was placed at -70° C. overnight