4-(2'-Methoxy-biphenyl-4-yloxymethyl)-5-methyl-furan-2-carboxylic acid methyl ester → 4-(2'-Methoxy-biphenyl-4-yloxymethyl)-5-methyl-furan-2-carboxylic acid
反応式
C[O:2][C:3]([C:5]1[O:6][C:7]([CH3:26])=[C:8]([CH2:10][O:11][C:12]2[CH:17]=[CH:16][C:15]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][C:19]=3[O:24][CH3:25])=[CH:14][CH:13]=2)[CH:9]=1)=[O:4]>O1CCCC1>[CH3:25][O:24][C:19]1[CH:20]=[CH:21][CH:22]=[CH:23][C:18]=1[C:15]1[CH:14]=[CH:13][C:12]([O:11][CH2:10][C:8]2[CH:9]=[C:5]([C:3]([OH:4])=[O:2])[O:6][C:7]=2[CH3:26])=[CH:17][CH:16]=1参加物
3
実験手順
A solution of 4-(2′-methoxy-biphenyl-4-yloxymethyl)-5-methyl-furan-2-carboxylic acid methyl ester (125) (40 mg, 0.11 mmoles) in dry tetrahydrofuran (25 ml) was treated with potassium trimethylsilanoate (73 mg, 0.56 mmoles) and the mixture stirred under an argon atmosphere for 16 h. After evaporation of the solvent the residue was acidified to pH=2 with 0.1M aqueous hydrochloric acid and the mixture extracted with ethyl acetate. The dried extracts were evaporated and the residue pumped under high vacuum at 40° C. to afford compound 126(29 mg) as an off-white solid. LC/MS System D; Rt=8.30 mins, m/z (ES+)=339 (M+H for C20H18O5).