Toluene → 4,4'-Tolan-dicarboxylic acid di-tert.-butyl ester

Reaction equation

[C:1]([O:5][C:6](=[O:14])[C:7]1[CH:12]=[CH:11][C:10](Br)=[CH:9][CH:8]=1)([CH3:4])([CH3:3])[CH3:2].[CH3:15][C:16]([OH:20])([C:18]#C)[CH3:17].C1(P([C:34]2[CH:39]=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[OH-:40].[Na+].[C:42]1([CH3:48])[CH:47]=[CH:46][CH:45]=[CH:44][CH:43]=1>[Cl-].C([N+](CC)(CC)CC)C1C=CC=CC=1.[Cu]I>[C:16]([O:20][C:48]([C:42]1[CH:47]=[CH:46][C:45]([C:39]#[C:34][C:10]2[CH:11]=[CH:12][C:7]([C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:14])=[CH:8][CH:9]=2)=[CH:44][CH:43]=1)=[O:40])([CH3:18])([CH3:17])[CH3:15]