“…As described in Scheme , the 1,3‐dipole generated in situ from decarboxylative cyclocondensation of ninhydrin 1 and sarcosine 2 reacted readily with the aryl furan containing chalcones 3a , 3b , 3c , 3d , 3e , 3f , 3g , 3h , 3i , 3j as dipolarophiles under refluxing conditions in absolute ethanol medium to give only one regioisomer as cycloadducts 4a , 4b , 4c , 4d , 4e , 4f , 4g , 4h , 4i , 4j in high yield, in which the benzoyl group was connected to C‐4 of the newly constructed pyrrolidine, thus showing that when strong electron‐withdrawing nitro group was replaced by weaker electron‐withdrawing group such as p ‐chlorophenyl, we were still able to reproduce the regiochemical trends similar to those of nitrofuran . But in the case of cycloaddition of azomethine ylides to furfuryl chalcone derivatives, 6a , 6b , 6c , 6d , 6e (Scheme ), a pair of regioisomers 7a , 7b , 7c , 7d , 7e and 8a , 8b , 8c , 8d , 8e were obtained with a modest yield and a poor regioisomeric ratio.…”