[OH:1][C:2]1[CH:18]=[CH:17][C:5]([CH2:6][CH:7]([CH2:13][CH2:14][CH2:15][CH3:16])[C:8]([O:10][CH2:11][CH3:12])=[O:9])=[CH:4][CH:3]=1.Br[CH2:20][CH2:21][O:22][CH:23]1[CH2:28][CH2:27][CH2:26][CH2:25][O:24]1.C(=O)([O-])[O-].[K+].[K+]>CC(N(C)C)=O>[CH2:13]([CH:7]([CH2:6][C:5]1[CH:4]=[CH:3][C:2]([O:1][CH2:20][CH2:21][O:22][CH:23]2[CH2:28][CH2:27][CH2:26][CH2:25][O:24]2)=[CH:18][CH:17]=1)[C:8]([O:10][CH2:11][CH3:12])=[O:9])[CH2:14][CH2:15][CH3:16]In a similar manner to that described in Reference example 3(e), a reaction was carried out using ethyl 2-(4-hydroxybenzyl)caproate (2.40 g), which is the product of Reference example 6(c), 2-(2-bromoethoxy)tetrahydropyran (1.63 g) and potassium carbonate (3.23 g) in dimethylacetamide and the reaction mixture was treated to afford the desired compound (2.47 g) as a syrup.
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