Direct alkylation of pyrrole with vinyl substituted aromatics: versatile precursors for the synthesis of porphyrinoid macrocycles
作者:Seong-Jin Hong、Seung-Doo Jeong、Jaeduk Yoo、Jong Seung Kim、Juyoung Yoon、Chang-Hee Lee
DOI:10.1016/j.tetlet.2008.04.119
日期:2008.6
5-Substituted dipyrromethane analogues (8), (23) and (25) were synthesized by the reaction of 2-vinylpyrroles, 2-vinylthiophene or 2-vinylbenzenes with excess pyrrole in the presence of Lewis acids. Accordingly, tripyrromethane analogues could be obtained by starting with 2,5-divinyl thiophene or 2,6-divinylbenzenes. The reaction usually gave moderate yields and catalyst-dependent was seen in some
Real-time imaging of fluctuations in intracellular glutathione (GSH) concentrations is critical to understanding the mechanism of GSH-related cisplatin-resistance. Here, we describe a ratiometric fluorescence probe based on a reversible Michael addition reaction of GSH with the vinyl-functionalized boron-dipyrromethene (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene or BODIPY) 1. The probe was applied
substituent. Pro-1 predominantly keeps photodynamically inactive in the vasculature at pH 7.4. After targeting the elevated polyamine transporters in neoplastic cells, pro-1 transforms into a conjugated BODIPYphotosensitizer 1 by tumor-associated acidic extracellular matrix (pH 6.5–6.8) and the neoplastic increased abundance of lysosomes (pH 4.5–5.5). The phototoxicity of 1 effectively inhibits the growth