反应详情

To a solution of ethyl 3-hydroxycyclobutanecarboxylate (10.2 g, 78.4 mmol) in dry pyridine (56.5 mL) at 0° C., TsCl (14.9 g, 78.4 mml) was added portion-wise. The resulting mixture was stirred at rt overnight. The reaction mixture was concentrated in vacuo and the residue obtained was dissolved in EtOAc (100 mL) and sequentially washed with 2 N HCl (100 mL), saturated NaHCO3 (100 mL) and water (100 mL). The organic layer was dried over Na2SO4, filtered, and concentrated to obtain ethyl 3-(tosyloxy)cyclobutanecarboxylate as a pale yellow oil, which was used in the next step without further purification.

1. concentrationThe reaction mixture was concentrated in vacuo
2. customthe residue obtained
3. washsequentially washed with 2 N HCl (100 mL), saturated NaHCO3 (100 mL) and water (100 mL)
4. dry with materialThe organic layer was dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated