Synthesis of Dispiro[indole-3,2′-pyrrolidine-3′,2″-pyrrolizine]-1″,2(1<i>H</i>)-diones<i>via</i>Azomethine Ylide 1,3-Dipolar Cycloaddition
作者:Xiaofang Li、Rongqiong Yi、Bin Liu、Zhikui Li、Xianyong Yu、Pinggui Yi
DOI:10.1002/jhet.1103
日期:2013.7
The 1,3‐dipolar cycloaddition of azomethine ylide generated in situ from isatin and sarcosine to 2‐arylmethylidene‐2,3‐dihydro‐1H‐pyrrolizin‐1‐ones afforded novel 1′‐methyl‐4′‐(aryl)‐1″H‐dispiro[indole‐3,2′‐pyrrolidine‐3′,2″‐pyrrolizine]‐1″,2(1H)‐diones in good yields. The structures of all the products were characterized thoroughly by NMR, infrared spectroscopy, mass spectrum, and elemental analysis