N,N'-Diphenylformamidine → 3-methyl-2-((E)-2-phenylamino-vinyl)-1,3-bis-(3-sulfo-propyl)-3H-indolium sodium salt

참여 물질

반응 단계

0.822 g (2 mmol) 2,3-dimethyl-1,3-bis-(3-sulfo-propyl)-3H-indolium sodium salt 7 and 0.49 g (2.5 mmol) N,N′-diphenyl-formamidine are dissolved in 20 ml methanol and stirred for about four hours under reflux. The solvent is removed in vacuum after cooling to room temperature. The residue is washed carefully with ethyl acetate. A dark yellow solid is obtained which is processed without further purification.

출처 및 근거