| 释义 |
pyrazoline Chem.|paɪər-, pɪˈræzəlɪn|
[ad. G. pyrazolin (L. Knorr 1887, in Ann. d. Chem. CCXXXVIII. 144): see prec. and -ine5.]
Any of three isomeric compounds, C3H6N2, which are dihydro derivatives of pyrazole; spec. CH2·CH2·CH:N·NH (2-pyrazoline), a colourless basic liquid, the only one of the three so far prepared; also, any substituted derivative of any of these compounds.
1887[see pyrazole]. 1938R. C. Fuson in H. Gilman Org. Chem. I. i. 30 Pyrazolines are unstable toward heat and decompose to give cyclopropane derivatives. 1961G. M. Badger Chem. Heterocyclic Compounds v. 223 Pyrazolines are much less stable than the corresponding pyrazoles and are attacked by oxidizing agents. 1967C. H. Jarboe in R. H. Wiley Pyrazoles vi. 177 Examples of each of the three tautomeric pyrazoline structures..are well known, 2-pyrazoline being by far the most common. 1968[see pyrazolone]. |