Porphyrin on a Half-Shell! Synthesis and Characterization of Corannulenoporphyrins
作者:Holly Boedigheimer、Gregory M. Ferrence、Timothy D. Lash
DOI:10.1021/jo902592u
日期:2010.4.16
di-tert-butyl ester tripyrrane with TFA cleaved the protective groups, and subsequent condensation with diformylpyrroles in TFA-CH2Cl2, followed by oxidation with DDQ or ferric chloride, gave excellent yields of corannulenoporphyrins. Nickel(II), copper(II), and zinc complexes of this system were also prepared, and the nickel derivative was also further characterized by X-ray crystallography. The same synthetic
描述了一种用于制备棒脑卟啉的有效合成方法。在磷腈碱的存在下,使硝基戊环戊烯与异氰基乙酸乙酯反应,生成关键的环戊烯基吡咯中间体。在180-190°C的条件下,用乙二醇中的KOH裂解乙酯部分后,在弱酸性条件下使七环体系与乙酰氧基甲基吡咯反应,得到三吡喃。这些三吡咯中间体的质子NMR光谱表明它们可以具有螺旋几何形状,但其构型取决于末端酯基的性质,并可能因溶剂相互作用而改变。用TFA处理二叔丁酯三吡喃裂解保护基,然后在TFA-CH中与二甲酰基吡咯缩合2 Cl 2,然后用DDQ或氯化铁氧化,可得到优异的氢化萘并卟啉。还制备了该体系的镍(II),铜(II)和锌络合物,并且还通过X射线晶体学对镍衍生物进行了进一步表征。同样的合成策略也用于制备具有稠合和亚环戊二烯亚基的卟啉。熔融的碗状氢化萘可为这些卟啉提供独特的结构成分,该结构成分可通过减少π-π堆积相互作用来增加溶解度。