反应详情

To a solution of cis-cyclobutane-1,3-dicarboxylic acid (4.00 g, 27.75 mmol), benzyl alcohol (2.87 mL, 27.75 mmol) and DMAP (0.339 g, 2.78 mmol) in DMF (80 mL) was added WSC (5.59 mL, 30.53 mmol) at room temperature, and the mixture was stirred overnight. The reaction mixture was poured into water, and the pH of the mixture was adjusted to 2 to 3 with 1N hydrochloric acid. The mixture was extracted with ethyl acetate, and the organic layer was washed with water and brine, and dried over magnesium sulfate, and the solvent was evaporated under reduced pressure to give crude cis-3-((benzyloxy)carbonyl)cyclobutanecarboxylic acid (5.93 g, 25.3 mmol, 91%) as a colorless oil. This compound was used for the next step without purification.

1. extractionThe mixture was extracted with ethyl acetate
2. washthe organic layer was washed with water and brine
3. dry with materialdried over magnesium sulfate
4. customthe solvent was evaporated under reduced pressure