C1(C2C[C:9](=[O:11])C2)C=CC=CC=1.[F:12][C:13]1[CH:18]=[CH:17][C:16]([CH:19]2[CH2:22][C:21](=O)[CH2:20]2)=[CH:15][CH:14]=1>>[F:12][C:13]1[CH:18]=[CH:17][C:16]([C@H:19]2[CH2:22][C@H:21]([CH:9]=[O:11])[CH2:20]2)=[CH:15][CH:14]=1Instead of 3-phenylcyclobutanone, 3-(4-fluorophenyl)cyclobutanone (4.63 g) was used and treated by the same technique as in Reference Example 24-1 to give the titled compound as a colorless oil (720 mg).
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