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
在路易斯酸存在下,通过2-乙烯基吡咯,2-乙烯基噻吩或2-乙烯基苯与过量的吡咯的反应合成5-取代的二吡咯甲烷类似物(8),(23)和(25)。因此,可以通过以2,5-二乙烯基噻吩或2,6-二乙烯基苯为原料获得三吡咯甲烷类似物。该反应通常产生适中的产率,并且在某些情况下观察到催化剂依赖性。该反应与其他报道的二吡咯甲烷合成相容,可用于构建不寻常的卟啉。