Cl.C(OC([N:9]1[CH2:13][CH2:12][CH:11]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[CH2:10]1)=O)(C)(C)C>C(OCC)(=O)C>[C:14]1([CH:11]2[CH2:12][CH2:13][NH:9][CH2:10]2)[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1Hydrogen chloride (4N) in ethyl acetate (6 ml) was added to a solution of 1-tertbutoxycarbonyl-3-phenyl-pyrrolidine (1.84 g, 7.4 mmol) in ethyl acetate (2 ml) and the mixture was stirred for 2 hours. After azeotropical removal of the solvent and hydrogen chloride, the residue was partitioned between aqueous potassium carbonate and diethyl ether, and the organic layer was washed with brine, and dried over sodium sulfate. Removal of the solvent afforded 3-phenyl-pyrrolidine (0.95 g, 87%).
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