Schwalm, Cristiane S. published the artcileMetal halide hydrates as Lewis acid catalysts for the conjugated Friedel-Crafts reactions of indoles and activated olefins, Safety of 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, the publication is Journal of the Brazilian Chemical Society (2011), 22(4), 623-636, database is CAplus.
Metal halide hydrates, such as SnCl2.2H2O, MnCl2.4H2O, SrCl2.6H2O, CrCl3.6H2O, CoCl2.6H2O, and CeCl3.7H2O, were investigated as mild Lewis acid catalysts for the conjugate Friedel-Crafts reaction between indoles and activated olefins. The reactions were carried out with aliphatic unsaturated ketones over a period of days at room temperature, while chalcones reacted only under reflux conditions. The reactions with nitrostyrenes were either performed in solvent or under solventless conditions. In all cases reasonable to good yields were obtained.
Journal of the Brazilian Chemical Society published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C11H10N4, Safety of 1,2-Dimethoxy-4-(2-nitrovinyl)benzene.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia