Reactivities of variously substituted 4-heteracyclohexanones in the formation of oximes
作者:Kuppusamy Selvaraj、Palaniappan Nanjappan、Kondareddiar Ramalingam、Krishnasamy Ramarajan
DOI:10.1039/p29830000049
日期:——
The rates of oxime formation of 41 heterocyclic ketones have been measured at 5 °C in aqueous alcoholic solution buffered at pH 6.85. The data indicate an overall second-order reaction, first order each in ketone and hydroxylamine. In all cases investigated the reaction appears to be irreversible under the experimental conditions employed. Increased steric retardation is observed as steric crowding
已在5°C的pH值为6.85的酒精水溶液中测定了41种杂环酮的肟形成速率。数据表明总体为二级反应,一级反应分别为酮和羟胺。在所研究的所有情况下,该反应在所采用的实验条件下似乎都是不可逆的。随着在羰基官能团周围的空间拥挤的增加,观察到增加的空间延迟,这表明发生了确定胺基对羰基基团的速率的攻击。4-哌啶酮,oxan-4-ones,thian-4-ones,相应的1,1-dioxides和selenan-4-ones肟的形成速率有显着差异。