[C:1]1([CH2:7][CH2:8][C:9]([OH:11])=[O:10])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH:12](O)([CH3:14])[CH3:13].C1CCC(N=C=NC2CCCCC2)CC1.C(O)(=O)C>N1C=CC=CC=1>[C:1]1([CH2:7][CH2:8][C:9]([O:11][CH:12]([CH3:14])[CH3:13])=[O:10])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1To a mixture of 3-phenylpropionic acid (15.0 g) and isopropanol (6.61 g) in pyridine (30 ml) perchloric acid (0.150 g) and DCC (24.8 g) are added. After stirring at room temperature for 24 h acetic acid (10 ml) is added, and the reaction mixture is worked-up as described in Example 1 to give a 94% yield of isopropyl 3-phenylpropionate (b. p., see Example 2).
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