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a) 4-methoxycinnamic acid, EDC, DMAP, DMF/DCM, 18h, 42–66% (Procedure IX); b) 4-methoxyphenylpropionic acid, EDC, DMAP, DCM/DMF, 18h, 66% (Procedure IX); c) phenylpropionyl chloride, Et3N, DCM, 99%; d) POCl3, toluene, reflux, 1.5h (Procedure VI); e) NaBH4, MeOH, 18h, 58–73% over two steps (Procedure VI); f) substituted benzoyl chloride, Et3N, DCM, 0°C, 38–84% (Procedure VII).
