i-propyl 6-methyl-1,2-dihydro-3H-pyrrolo<1,2-a>-1-carboxylate 、
N,N,1-三甲基-1H-吡咯-2-甲酰胺 以to produce isopropyl 5-(N-methyl-2-pyrroyl)-1,2-dihydro-6-methyl-3H-pyrrolo[1,2-a]pyrrole-1-carboxylate (XI, R and R1 = CH3, R2 = iC3H7)的产率得到isopropyl 5-(N-methyl-2-pyrroyl)-1,2-dihydro-6-methyl-3H-pyrrolo[1,2-a]-pyrrole-1-carboxylate