作者:Mino Caira、Florea Dumitrascu、Emilian Georgescu、Florentina Georgescu、Marcel Popa、Bogdan Draghici、Dan Dumitrescu
DOI:10.1055/s-0029-1218372
日期:2009.12
Treatment of quinazolin-4(3H)-one bromides with acetylenic dipolarophiles in 1,2-epoxybutane medium gave, in good yields, N-arylpyrroles instead of the corresponding pyrrolo[1,2-a]quinazolines. The structures of the pyrroles were deduced by NMR spectroscopy and confirmed by X-ray crystal structure analysis. The 1 H NMR spectra of ethyl esters revealed hindered rotation about the N―Ar bond.
在 1,2-环氧丁烷介质中用炔属偶极亲和试剂处理 quinazolin-4(3H)-one 溴化物,得到 N-芳基吡咯,而不是相应的吡咯并 [1,2-a] 喹唑啉。吡咯的结构由核磁共振光谱推导并由X射线晶体结构分析证实。乙酯的 1 H NMR 谱揭示了围绕 N-Ar 键的受阻旋转。