Trimethylsilyl-1,3,4-oxadiazoles—new useful synthons for the synthesis of various 2,5-disubstituted-1,3,4-oxadiazoles
作者:Evgenij V. Zarudnitskii、Igor I. Pervak、Anatolij S. Merkulov、Aleksandr A. Yurchenko、Andrej A. Tolmachev
DOI:10.1016/j.tet.2008.08.040
日期:2008.11
The reactivity of 2-aryl-5-trimethylsilyl-1,3,4-oxadiazoles toward different types of electrophiles was investigated. These silanes readily react with chlorine, bromine, aliphatic acyl chlorides, 2-nitrobenzenesulfenyl chloride, and some reactive isocyanates affording the corresponding substituted 1,3,4-oxadiazoles. The reactions with carbonyl compounds proceed only in the presence of F− anions.
研究了2-芳基-5-三甲基甲硅烷基-1,3,4-恶二唑对不同类型亲电试剂的反应性。这些硅烷容易与氯,溴,脂肪族酰氯,2-硝基苯磺酰氯和一些反应性异氰酸酯反应,得到相应的取代的1,3,4-恶二唑。与羰基化合物反应仅进行在F的存在-的阴离子。