C([O:4][CH2:5][CH2:6][O:7][CH2:8][C:9]1[CH:14]=[C:13]([Cl:15])[CH:12]=[C:11]([Cl:16])[C:10]=1[C:17]#[N:18])(=O)C.[OH-].[Na+]>C1COCC1.CO>[NH2:18][CH2:17][C:10]1[C:11]([Cl:16])=[CH:12][C:13]([Cl:15])=[CH:14][C:9]=1[CH2:8][O:7][CH2:6][CH2:5][OH:4]A soln. of BH3 (1.46 mL, 1M in THF) was added to a soln. of 2-((3,5-dichloro-2-cyanobenzyl)oxy)ethyl acetate (0.36 mmol) in 1.5 mL MeOH. The reaction mixture was heated to 60° C. for 3 h. At 0° C., 1.5 mL MeOH was dropwise added and the mixture was stirred until gaz evolution was finished. An aq. soln. of 10% NaOH was added still under cooling. The solvent was removed under vacuo, the residue was diluted with water and extracted 3 times with EtOAc. The comb. org. layers were dried over MgSO4 and conc. in vacuo to give the desired product as yellow solid.
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