反应详情

To a solution of (3aSR,6aRS)-3-methyl-2-oxo-hexahydro-cyclopentaimidazole-1-carboxylic acid tert-butyl ester (Example 1, step 2) (1.60 g, 6.29 mmol) in 15 ml of dichloromethane was added trifluoroacetic acid (5.74 g, 3.9 ml, 50.3 mmol, 8 equiv.) and the yellow solution was stirred for 15 h at room temperature. The reaction mixture was quenched by addition of saturated sodium bicarbonate solution and the pH of the aqueous phase was set to 9. After workup with dichloromethane/water, the organic phases were dried, filtered and concentrated in vaccuo to yield 0.801 g of a yellow oil, which directly used in the next step without further characterization.

1. customThe reaction mixture was quenched by addition of saturated sodium bicarbonate solution
2. dry with materialAfter workup with dichloromethane/water, the organic phases were dried
3. filtrationfiltered
4. concentrationconcentrated in vaccuo