[Cl:1][C:2]1[CH:3]=[C:4]([CH:27]=[CH:28][C:29]=1[O:30][CH3:31])[CH2:5][NH:6][C:7]1[C:16]2[C:11](=[CH:12][CH:13]=[C:14]([C:17]#[N:18])[CH:15]=2)[C:10]([C:19]#[C:20][C:21]2([OH:26])[CH2:25][CH2:24][CH2:23][CH2:22]2)=[N:9][N:8]=1.[H][H]>O1CCCC1.[Pd]>[Cl:1][C:2]1[CH:3]=[C:4]([CH:27]=[CH:28][C:29]=1[O:30][CH3:31])[CH2:5][NH:6][C:7]1[C:16]2[C:11](=[CH:12][CH:13]=[C:14]([C:17]#[N:18])[CH:15]=2)[C:10]([CH2:19][CH2:20][C:21]2([OH:26])[CH2:25][CH2:24][CH2:23][CH2:22]2)=[N:9][N:8]=1690 mg of 4-[(3-chloro-4-methoxybenzyl)amino]-1-[2-(1-hydroxycyclopentyl)-1-ethynyl]-6-phthalazine carbonitrile was dissolved in 200 ml tetrahydrofuran, 50 mg of 10% Pd—C was added thereto, and the mixture was stirred for 0.5 hr in a hydrogen atmosphere. The reaction solution was filtered through Celite, and the filtrate was evaporated. The resulting residue was purified by silica gel column chromatography to give 400 mg of 4-[(3-chloro-4-methoxybenzyl)amino]-1-[2-(1-hydroxycyclopentyl)ethyl]-6-phthalazine carbonitrile. This product was converted in a usual manner into the hydrochloride.
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