(2R,3R)-3-(tert-Butyldimethylsilanyloxy)-2-hydroxymethylpyrrolidine-1-carboxylic acid tert-butyl ester → (3R)-1-t-Butoxycarbonyl-3-t-butyldimethylsilyloxy-L-proline

Temperature

0 °C

0.7 ml of Jones' reagent (chromium trioxide/4N aqueous sulfuric acid: Bowden, Heibron, Jones & Weedon, J. Chem. Soc., 1946, 39) was added, whilst ice-cooling, to a solution of 245 mg (0.74 mmol) of (3R)-1-t-butoxycarbonyl-3-t-butyldimethylsilyloxy-L-prolinol [prepared as described in step (a) above] in 10 ml of acetone, and the mixture was stirred at 0° C. for 2 hours. At the end of this time, the reaction mixture was diluted with water and extracted with diethyl ether. The extract was washed with a saturated aqueous solution of sodium chloride and dried over anhydrous sodium sulfate. The solvent was then removed by distillation under reduced pressure, and the residue was triturated with hexane, to give 191 mg of the title compound as colorless crystals, melting at 146°-147° C.

1. extractionextracted with diethyl ether
2. washThe extract was washed with a saturated aqueous solution of sodium chloride
3. dry with materialdried over anhydrous sodium sulfate
4. customThe solvent was then removed by distillation under reduced pressure
5. customthe residue was triturated with hexane

ORD record

ord-2c9a389ba50e4b619b8252e2e56b8277

Source dataset

uspto-grants-1997_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05629406