Synthesis of 3,5-disubstituted-1,2,4-oxadiazoles using tetrabutylammonium fluoride as a mild and efficient catalyst
作者:Anthony R Gangloff、Joane Litvak、Emma J Shelton、David Sperandio、Vivian R Wang、Kenneth D Rice
DOI:10.1016/s0040-4039(00)02288-7
日期:2001.2
Tetrabutylammonium fluoride (TBAF) was found to be a mild and efficient catalyst for the synthesis of 3,5-disubstituted-1,2,4-oxadiazoles. Using 0.1–1.0 equivalents of TBAF in THF for 1–24 h at room temperature, alkanoyl- and aroyloxyamidines were converted in high yield to the corresponding 3,5-disubstituted-1,2,4-oxadiazoles. A variety of R and R′ substituents were investigated.
发现四丁基氟化铵(TBAF)是合成3,5-二取代-1,2,4-恶二唑的温和而有效的催化剂。在室温下,使用THF中的0.1–1.0当量的TBAF,在室温下放置1–24小时,可以将烷酰基-和芳酰氧基am以高收率转化为相应的3,5-二取代-1,2,4-恶二唑。研究了各种R和R'取代基。