Factory Supply CAS 40276-11-7 2, 5-Dimethoxy-β -Nitrostyrene

Factory Supply CAS 40276-11-7 2, 5-Dimethoxy-β -Nitrostyrene Package:1kg/bag,5kg/bag or 25kg/Hardboard drum or as your requirment1KG : Double pharma-grade polybag inside,sealed Aluminum foil bag outside5KG : Double pharma-grade polybag inside,Hardboard cartons outside25KG: Double pharma-grade polybag inside,Hardboard drum outside Product Name: 2,5-DIMETHOXY-BETA-NITROSTYRENE Synonyms: 4-METHOXY-2-[(E)-2-NITROETHENYL]PHENYL METHYL ETHER;1-(2,5-DIMETHOXYPHENYL)-2-NITROETHENE;1,4-DIMETHOXY-2-[(E)-2-NITROETHENYL]BENZENE;1,4-DIMETHOXY-2-(2-NITROETHENYL) BENZENE;1,4-DIMETHOXY-2-(2-NITROVINYL)BENZENE;2-(2,5-DIMETHOXYPHENYL)NITROETHENE;2,5-DIMETHOXY-BETA-NITROSTYRENE;TRANS-2,5-DIMETHOXY-BETA-NITROSTYRENE CAS: 40276-11-7 MF: C10H11NO4 MW: 209.2 EINECS: 203-130-8 Melting point  116-120 °C(lit.) Boiling point  348.55°C (rough estimate) density  1.197 refractive index  1.5400 (estimate) storage temp.  2-8°C Chemical Properties orange crystalline powder Preparation A preparation method of 2, 5-dimethoxy-beta-nitrostyrene, which comprises the following steps: step (1): adding materials 2, 5-dimethoxybenzaldehyde, nitromethane, ammonium acetate and an organic solvent into a reaction kettle, wherein the mass ratio of the materials 2, 5-dimethoxybenzaldehyde to nitromethane to the organic solvent to ammonium acetate is 1:0.7-0.9:4-5:0.25-0.3, and reacting for 4-10 hours at the temperature of 70-80 ℃; step (2) of adding an aqueous solution to the reaction solution obtained in step (1) and washing the mixture to separate the mixture into an aqueous layer and an organic layer; and directly cooling and crystallizing the organic layer, and centrifuging to obtain a finished product of the 2, 5-dimethoxy-beta-nitrostyrene.