Reactions of diazoalkanes with unsaturated compounds 15. Catalytic reactions of unsaturated carbonyl compounds and their derivatives with diazomethane
作者:M. D. Khanova、R. M. Sultanova、S. S. Zlotskii、V. A. Dokichev、Yu. V. Tomilov
DOI:10.1007/s11172-005-0348-7
日期:2005.4
The present study concerned with the influence of the nature of the acetal fragment in unsaturated compounds on the reactivity of the C=C bond in cyclopropanation reactions with diazomethane catalyzed by copper and palladium compounds. The acetal substituents at the α- or γ-position with respect to the C=C bond were found to exert an activating effect on the yields of cyclopropanation products compared
本研究涉及不饱和化合物中缩醛片段的性质对铜和钯化合物催化的重氮甲烷环丙烷化反应中 C=C 键反应性的影响。发现与起始不饱和羰基化合物相比,C=C 键的 α-或 γ-位的缩醛取代基对环丙烷化产物的产率具有活化作用,后者产生 1,3-偶极环加成物CH2N2 作为副产品。双键的环丙烷化似乎由 Pd(acac)2 最有效地催化。