A one-pot, three-component regiospecific synthesis of dispiropyrrolidines containing a thiophenone ring via 1,3-dipolar cycloaddition reactions of azomethine ylides
作者:Firouz Matloubi Moghaddam、Mohammad Reza Khodabakhshi、Zahra Ghahremannejad、Behzad Koushki Foroushani、Seik Weng Ng
DOI:10.1016/j.tetlet.2013.03.023
日期:2013.5
The synthesis of new dispiropyrrolidines containing a thiophenone ring has been achieved by a one-pot, three-component 1,3-dipolar cycloaddition reaction. Unsaturated thiophenone dipolarophiles were reacted with azomethine ylides, generated in situ from sarcosine and cycloketone derivatives (isatin, ninhydrin, acenaphthoquinone), to produce the corresponding cycloadducts in good yields (70–90%). The
含有噻吩环的新双螺并吡咯烷的合成已通过一锅,三组分的1,3-偶极环加成反应完成。使不饱和噻吩双极性亲和剂与由肌氨酸和环酮衍生物(靛红,茚三酮,苯醌)原位生成的甲亚胺基团反应,以高收率(70-90%)产生相应的环加合物。发现环加成反应是高度区域选择性和非对映选择性的。