Water → cis-3-hydroxy-4-phenylazetidin-2-one

HRID 1682170Notes

Reaction equation

[OH-].[K+].C([O:6][C@H:7]1[C@@H:10]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[NH:9][C:8]1=[O:17])(=O)C.O.C(=O)(O)[O-].[Na+]>C1COCC1>[OH:6][C@H:7]1[C@@H:10]([C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[NH:9][C:8]1=[O:17]

Participants

Conditions

Temperature: 0 °C

Procedure

To a solution of 200 mL of THF and 280 mL of 1M aqueous potassium hydroxide solution at 0° C. was added a solution of 4.59 g (22.4 mmol) of cis-3-acetoxy-4-phenylazetidin-2-one in 265 L of THF via a dropping tunnel over a 40 min period. The solution was stirred at 0° C. for 1 h and 100 mL of water and 100 mL of saturated sodium bicarbonate were added. The mixture was extracted with four 200 mL portions of ether acetate and the combined organic layers were dried over sodium sulfate and concentrated to give 3.54 g (97%) of racemic cis-3-hydroxy-4-phenylazetidin-2-one as white crystals, m.p. 147°-149° C. This material was resolved into its enantiomers by recrystallization of its 2-methoxy-2-(trifluoromethyl)phenylacetic ester from hexane/acetone followed by hydrolysis, [α]25Hg 177°.

Workup

extractionThe mixture was extracted with four 200 mL portions of ether acetate
dry with materialthe combined organic layers were dried over sodium sulfate
concentrationconcentrated

Sources & evidence

ORD record: ord-f5e4ab61c82a44f78f6da817b3b267fc
Source dataset: uspto-grants-1992_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05175315

Reaction notes

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