Reactivity of pyrrole pigments. Part 5: Electrophilic substitution?Nitration and bromination?Of some pyrromethenones and 5-arylmethylene-3,4-dimethyl-3-pyrrolin-2-ones
Reactivity of pyrrole pigments. Part 5: Electrophilic substitution?Nitration and bromination?Of some pyrromethenones and 5-arylmethylene-3,4-dimethyl-3-pyrrolin-2-ones