| 摘要 |
<p>1-alkyl-3-halo-5-aryl pyrazolines Cpds. of formula: useful as intermediates, are prepared by reacting a phosphorus oxyhalide with the corresponding pyrazotidin-3-one, (where R1-5 = H, halogen, alkyl, haloalkyl or alkoxy; R6 = 1-5C alkyl pref. methyl and X = halogen, pref Cl.</p> |
