A solution of NaNO2 (6.80 g, 20 ml of water) was added dropwise
into a mixture of 4-aminophenylmethanol (12.14 g), HCl (36%,
40 ml) and water (100 ml) with vigorous stirring at 273 K. After
30 min of stirring, the diazonium salt solution was filtered and
dropwise added to coupling agent solution, cooled at 273e5 K and
prepared by adding 25 g