作者:Rudhramyna Gnaneshwar、Swaminathan Sivaram
DOI:10.1080/00397910903243815
日期:2010.7.27
Addition of [1-methoxy-2 methyl-1-propenyl)-oxy] trimethylsilane (MTS) to unsymmetrical α,β-unsaturated cyclic anhydrides (namely, itaconic anhydride and citraconic anhydride) as well as symmetrical anhydrides (namely, maleic anhydride and 2,3-dimethylmaleic anhydride) was investigated. Itaconic anhydride isomerizes to citraconic anhydride in the presence of MTS. In the presence of Lewis acid catalysts
[1-甲氧基-2甲基-1-丙烯基)-氧基]三甲基硅烷(MTS)与不对称α,β-不饱和环状酸酐(即衣康酸酐和柠康酸酐)以及对称酸酐(即马来酸酐和2,3-二甲基马来酸酐)进行了研究。在 MTS 存在下,衣康酸酐异构化为柠康酸酐。在路易斯酸催化剂 (Yb(OTf)3/CH2Cl2) 的存在下,MTS 在室温下以 1,4-方式添加到衣康酸酐中。1,2-加成是2,3-二甲基马来酸酐和柠康酸酐的优选途径。