反应详情

A solution of 4-benzo[1,3]dioxol-5-yl-cyclohex-3-enone (as prepared in the previous step, 680 mg, 3.15 mmol) and azetidin-3-yl-carbamic acid tert-butyl ester (BetaPharma, 542 mg, 3.15 mmol) in DCM (10 mL) was treated with NaBH(OAc)3 (Aldrich, 2.0 g, 9.45 mmol) at room temperature. The reaction was stirred for 4 hours and quenched with saturated sodium bicarbonate. The organic layer was separated and the aqueous layer was extracted 3 times with DCM. The combined organic layers were dried over anhydrous Na2SO4, filtered and concentrated to give the crude product, which was then purified by a CombiFlash® system using hexanes and ethyl acetate as eluent (from pure hexanes to pure ethyl acetate) to afford the title compound as a white solid.

1. customquenched with saturated sodium bicarbonate
2. customThe organic layer was separated
3. extractionthe aqueous layer was extracted 3 times with DCM
4. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customto give the crude product, which
8. customwas then purified by a CombiFlash® system