ethyl 2-(3-amino-1,1-dioxothietan-3-yl)acetate

Conditions: temp:45.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: ethyl 2-(3-amino-1,1-dioxo-thietan-3-yl)acetate (example 160c, 548 mg, 2.64 mmole) was dissolved in a solution 2.0M of methylamine in methanol (19.8 mL, 39.7 mmole) and the reaction mixture was stirred at 45° C. overnight. Removal of volatiles in vacuo yielded the title compound (505 mg, 99%) as crude light brown oil which was used without any further purification; MS (ESI, m/z): 193.1 (M+H+). Removal of volatiles in vacuo

Conditions: temp:45.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Ethyl 2-(3-amino-1,1-dioxo-thietan-3-yl)acetate (example 160c, 550 mg, 2.65 mmol) was dissolved in ammonia 7.0M in methanol (9 ml, 63.0 mmol) and the reaction flask was sealed (size of the flask was chosen to minimize the volume for gas expansion in order to minimize ammonia evaporation). The reaction was stirred at 45° C. for 2 days. Volatiles were removed in vacuo to yield a crude material (523 mg) containing a 4:1 ratio of amide:methyl ester. The crude material was used without any further purification; MS (ESI, m/z): 179.1 (M+H+). the reaction flask was sealed (size of the flask ammonia evaporation) Volatiles were removed in vacuo

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of ethyl 2-[3-(benzylamino)-1,1-dioxo-thietan-3-yl]acetate (example 160b, 0.5 g, 1.68 mmol) in EtOH (12.5 ml) under an argon atmosphere was added palladium on charcoal 10% (w/w 10%) (50.0 mg, 470 μmol). The reaction flask was put under a pressure of 2.5 bar H2 and the reaction mixture was then stirred at 50° C. for 16 hours. Palladium catalyst was removed by filtration over a pad of Celite and the filter cake was washed with ethanol twice. The filtrate was evaporated down to dryness to yield the title compound (350 mg, 100%) as a crude product which was used without any purification. MS (ESI, m/z): 208.1 (M+H+). Palladium catalyst was removed by filtration over a pad of Celite the filter cake was washed with ethanol twice The filtrate was evaporated down to dryness