中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
4-乙酰基-3,5-二甲基-2-吡咯羧酸叔丁酯 | tert-butyl 3,5-dimethyl-4-acetyl-2-pyrrolecarboxylate | 63040-83-5 | C13H19NO3 | 237.299 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | tert-butyl 5-formyl-3-methyl-1H-pyrrole-2-carboxylate | 89188-56-7 | C11H15NO3 | 209.245 |
3,4,5-三甲基-2-吡咯羧酸叔丁酯 | tert-butyl 3,4,5-dimethylpyrrole-2-carboxylate | 50634-31-6 | C12H19NO2 | 209.288 |
—— | 5-Formyl-3,4-dimethylpyrrol-2-carbonsaeure-tert-butylester | 59435-12-0 | C12H17NO3 | 223.272 |
—— | tert-butyl 5-(2-cyano-3-ethoxy-3-oxo-1-propenyl)-3,4-dimethyl-1H-pyrrole-2-carboxylate | 59435-13-1 | C17H22N2O4 | 318.373 |
Porphyrins that have one nitrogen atom instead of a methine bridge at the meso-position are named monoazaporphyrin. This class of porphyrinoid compounds though first investigated by Fischer in the thirties of the last century is still less common compared to other porphyrin derivatives. We describe here a concise convergent synthetic route leading to a symmetric azaporphyrin 7a and its zinc compex 22.
The synthesis of symmetric α-free meso-H-dipyrrin hydrobromides from 5-H-2-formyl pyrroles was investigated. The self-condensation produces regioisomeric dipyrrins through adoption of two mechanistic pathways. The key difference between the two pathways lies in which position of the pyrrole directs nucleophilic attack. Through a systematic study involving various substituted and (or) isotopically labelled 5-H-2-formyl pyrroles, we herein provide evidence to suggest that not only do two mechanistic pathways exist, but the steric bulk of the substituent adjacent to the 5-unsubstituted position influences which pathway dominates.