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Reagents and conditions: (a)Benzyl bromide, K2CO3, acetone, 98%. (b) 30% H2O2, NaH2PO4, NaClO2, acetonitrile, H2O, 72%. (c) DPPA, Et3N, benzene, then reflux. (d) (S)-α-Phenylethylamine, DCM, 48% (two steps). (e) Hydrogen, 5% palladium on activated carbon, DMF, 85%. (f) Alkyl bromide, K2CO3, 18-crown-6, DMF, 80–95%.
