pyrazoline การใช้

• Thus, pyrazoline derivatives convert by condensation to ?, ?-unsaturated ketones:
• For example, diazomethane generally adds to methyl acrylate to give 3-carboxyl pyrazoline.
• "' Pyrazoline "'is a heterocyclic chemical compound with the molecular formula C 3 H 6 N 2.
• The Piloty-Robinson reaction competes with the formation of pyrazoline when the reactant is an aliphatic azine derived from a ketone.
• In 1912, Kischner later applied the catalytic decomposition to pyrazoline bases and developed a versatile method for the preparation of substituted cyclopropanes by thermal decomposition of pyrazolines.
• With phenyldiazomethane as the reactant the regioselectivity is reversed and the reaction is extended even further by simple air organic oxidation of the 2-pyrazoline to the pyrazole.
• The actual process taking place is path A with elimination of HI to the diazo compound "'4 "'followed by a diazoalkane 1, 3-dipolar cycloaddition to the pyrazoline "'5 "'in 85 % yield.
• Ber . 1967, 100, 60 . ) Tetrazoles with amino or styryl groups that can be activated by UV light at 365 nm ( 365 does not damage cells ) react quickly ( so that the UV light does not have to be on for a long time, usually around 1 4 minutes ) to make fluorogenic pyrazoline products.