| 摘要 |
<p>New cpds. of formula (I) (where R1 is alkyl or alkoxy; R2 is alkoxy, alkylthio, NH2 or mono- or dialkylamino; R3 is H, alkyl, aralkyl or cycloalkyl; X is O or S) are pref. prepd. by reacting a 5-R3-3-hydroxy-1,2,4-thiadiazole (II) (also new cpds.) with Cl(X)P(R1)R2 in the presence of an acid binder or using an alkylammonium, NH4 or alkali metal salt of (II).</p> |
