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 somereactive isocyanates affording the corresponding substituted 1,3,4-oxadiazoles. The reactions with carbonylcompounds proceed only in the presence of F− anions.