[Br:1][C:2]1[CH:7]=[CH:6][C:5]([O:8][CH3:9])=[CH:4][C:3]=1[C:10]1([C:13]([OH:15])=O)[CH2:12][CH2:11]1.C(Cl)(=O)C(Cl)=O.[Br-].O[C:24]1[CH:49]=[CH:48][CH:47]=[CH:46][C:25]=1[CH2:26][P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>CN(C=O)C.C(Cl)Cl>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([O:8][CH3:9])=[CH:4][C:3]=1[C:10]1([C:13]2[O:15][C:24]3[CH:49]=[CH:48][CH:47]=[CH:46][C:25]=3[CH:26]=2)[CH2:11][CH2:12]1
To the DCM solution (6 ml) of 1-(2-bromo-5-methoxy-phenyl)-cyclopropane carboxylic acid (0.3 g, 1.1 mmol), DMF (2 drops) and oxalyl chloride (0.23 ml, 2.5 mmol) were added at room temperature, and the mixture was stirred at room temperature for 2 hrs. The residues obtained from the reaction solution after concentration under reduced pressure were dissolved in toluene (6 ml), added with (2-hydroxybenzyl)triphenylphosphonium bromide (0.605 g, 1.32 mmol) and TEA (0.46 ml, 3.3 mmol), and the resulting mixture was stirred and heated at 100° C. overnight. The residues obtained after concentration under reduced pressure were purified by silica gel column (hexane:DCM) to obtain the title compound (0.309 g, 81%).
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