[C:1]([C:3]1[CH:4]=[C:5]([CH:10]=[C:11]([CH2:13][CH3:14])[N:12]=1)[C:6]([O:8]C)=[O:7])#[N:2].[Li+].[OH-].Cl>C1COCC1.CO.O>[CH2:13]([C:11]1[CH:10]=[C:5]([C:6]([OH:8])=[O:7])[CH:4]=[C:3]([C:1]#[N:2])[N:12]=1)[CH3:14]
Under N2, methyl 2-cyano-6-ethylisonicotinate (0.233 g, 1.23 mmol, Eq: 1.00) was diluted in THF (12.1 ml) and MeOH (1.46 ml). At 2-3° C., 1M LiOH in water (1.53 ml, 1.53 mmol, Eq: 1.25) was added dropwise (over 3 min) The RM was stirred at 2-3° C. for 30 minutes. Control with TLC: the reaction was finished. The reaction mixture was acidified with 1M HCl. The mixture was diluted with H2O and extracted with EtOAc. The organic phase was dried over MgSO4; filtered; concentrated in vacuo. White solid. MS (EIC): 174.9 ([M−H]−)
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