中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2,5-二甲基-1-间甲苯-1H-吡咯-3-甲醛 | 2,5-dimethyl-1-(3-methylphenyl)-1H-pyrrole-3-carbaldehyde | 423749-16-0 | C14H15NO | 213.279 |
2,5-二甲基-1-苯基吡咯-3-羰醛 | 2,5-dimethyl-1-phenyl-1H-pyrrole-3-carbaldehyde | 83-18-1 | C13H13NO | 199.252 |
The investigation of different oxide surfaces revealed that nanoporous silica (MCM-41) had the best catalytic activity for Paal–Knorr pyrrole synthesis. Despite the same composition, MCM-41 proved to be more effective than SiO2 itself, probably due to a significantly higher surface area of the SiO2 nanopores. The important features of this “clean” solvent-free protocol are the ease of recovery and the reuse of the catalyst for several cycles, operational simplicity, and easy product isolation and purification.