| 摘要 |
<p>A method for preparing oximes where an aldehyde or ketone is reacted with hydroxylamine or its salt in the presence of a catalytic amount of an organotin(IV) compound such as monoalkyltin(IV), dialkyltin(IV) and aryltin(IV). The organotin(IV) compound is represented by the formula I: (R<1>)nSnXm-n (I) where R<1> is independently selected from alkyl of 1 to 18 carbons or aryl, X is halogen, oxygen, hydroxyl, OR1, R<2>CO2-, R<2>O2C-(Z)y-CO2- or R<2>CO2(CH2)yS-, R<2> is alkyl of 1 to 18 carbons or aryl, Z is selected from CH2 or CH=CH, where y is O to 6, n is 1 or 2 and m is 4 except that when X is oxygen, n is 2 and m is 3. Exemplary of the organotin(IV) compounds are butyltin tris(2-ethylhexanoate), dibutyltin diacetate and diphenyltin dichloride.</p> |
