tert-butyl N-[(3R)-2-oxooxolan-3-yl]carbamate

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Clean sodium metal (0.205 g, 8.95 mmol) was added, in portions, to anhydrous methanol (20 mL) in a thick walled tube. The suspension was stirred under anhydrous nitrogen until all the metal had dissolved, then pyridine-2-thiol (1.0 g, 8.95 mmol) was added. After stirring for 20 min, (2-oxotetrahydro-furan-3(R)-yl)-carbamic acid tert-butyl ester (1.8 g, 8.95 mmol) was added as a solid and the tube was capped and heated to 100° C. for 16 h. The reaction mixture was concentrated, then purified via flash chromatography (MeOH, CH2Cl2 as eluent) to give 2(S)-tert-butoxycarbonylamino-4-(pyridin-2-ylsulfanyl)butyric acid (0.75 g) as a clear oil. had dissolved After stirring for 20 min the tube was capped The reaction mixture was concentrated purified via flash chromatography (MeOH, CH2Cl2 as eluent)