Triethylamine → Trans-3-Hydroxy-5-[2-(4-methoxyphenyl)ethenyl]phthalide

Reaction equation

[OH:1][CH:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9](Br)[CH:10]=2)[C:4](=[O:5])[O:3]1.[CH3:13][O:14][C:15]1[CH:22]=[CH:21][C:18]([CH:19]=[CH2:20])=[CH:17][CH:16]=1.C1(C)C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C.C(N(CC)CC)C>C([O-])(=O)C.[Pd+2].C([O-])(=O)C.O.CS(C)=O>[CH3:13][O:14][C:15]1[CH:22]=[CH:21][C:18](/[CH:19]=[CH:20]/[C:9]2[CH:10]=[C:11]3[C:6](=[CH:7][CH:8]=2)[C:4](=[O:5])[O:3][CH:2]3[OH:1])=[CH:17][CH:16]=1