Water → 4-Amino-1-naphthoic acid

反応式

[NH2:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]([C:12]#N)=[CH:4][CH:3]=1.[OH-:14].[K+].[OH2:16]>>[NH2:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]([C:12]([OH:16])=[O:14])=[CH:4][CH:3]=1

参加物

反応物 3

HCID 962Water

HCID 14797Potassium Hydroxide

HCID 428284-Amino-1-naphthalenecarbonitrile

生成物 1

HCID 4593144-Amino-1-naphthoic acid収率 90.6%

実験手順

4-amino-1-naphthalenecarbonitrile (1.50 g, 8.91 mmol) was dissolved into a 50% KOH solution (18 ml). The heterogeneous solution was heated at reflux for 2-3 days. Once the solution became homogenous and TLC showed no more starting material, the deep red solution was cooled and poured over 200 ml of water. The solution was then filtered and the acid was precipitated with concentrated HCl. The red crystals were filtered and the filtrate was refiltered to give pink crystals. The first fraction was treated with activated carbon to remove some of the red color. 1.51 g (90.6%) of product was obtained. mp 169°-171° C.; 1H NMR (CD3OD) 6.69 (1 H, d, J=8.2 Hz), 7.38-7.43 (1 H, m), 7.48-7.54 (1 H, m), 8.03 (1 H, d, J=8.5 Hz), 8.13 (1 H, d, J=8.2 Hz), 9.09 (1 H, d, J=8.5 Hz); 13C NMR (CD3OD) 107.39, 114.61, 122.99, 123.92, 125.21, 127.40, 128.48, 135.04, 151.35, 171.44; HRMS calc. for C11H7 NO2, 187.0633; found, 187.0642.