87688-25-3

Basic information

• Product Name: (4R,5S)-4-(1-Bromo-1-methyl-ethyl)-5-(4-methoxy-phenyl)-4,5-dihydro-pyrazole-3,3-dicarboxylic acid dimethyl ester
• CAS NO: 87688-25-3
• Molecular Weight: 413.268
• Mol File: 87688-25-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: (4R,5S)-4-(1-Bromo-1-methyl-ethyl)-5-(4-methoxy-phenyl)-4,5-dihydro-pyrazole-3,3-dicarboxylic acid dimethyl ester(CAS DataBase Reference)
• NIST Chemistry Reference: (4R,5S)-4-(1-Bromo-1-methyl-ethyl)-5-(4-methoxy-phenyl)-4,5-dihydro-pyrazole-3,3-dicarboxylic acid dimethyl ester(87688-25-3)
• EPA Substance Registry System: (4R,5S)-4-(1-Bromo-1-methyl-ethyl)-5-(4-methoxy-phenyl)-4,5-dihydro-pyrazole-3,3-dicarboxylic acid dimethyl ester(87688-25-3)

Safety Data

• Hazardous Substances Data: 87688-25-3(Hazardous Substances Data)

Upstream product

• 36825-10-2 dimethyl 2-bromo-2-methylpropylidenemalonate 
• 23304-25-8 p-methoxyphenyldiazomethane 

Downstream Products

• 87688-31-1 dimethyl 2-(1-broomo-1-methylethyl)-3-(4-methoxyphenyl)-1,1-cyclopropanedicarboxylate 

Relevant articles and documents

The Reaction between Diazoalkanes and Allylic Halides Carrying Electronegative γ-Substituents. 2. Formation and Decomposition of Dimethyl 4-(1-Bromo-1-methylethyl)-5-aryl-4,5-dihydro-3H-3,3-pyrazoledicarboxylates

The title compounds were synthesized by the reaction of the proper para-substituted phenyldiazomethanes and dimethyl 2-bromo-2-methylpropylidene-malonates. p-Cyano- and p-nitrophenyldiazomethane did not give 1-pyrazolines, but decomposed at the reaction conditions.Upon thermolysis in various solvents only cyclopropanes were obtained.Only small solvent effects were observed.The kinetic data gave good linear correlation with ?+-data, with a reaction constant, ρ=-1.00.