Synthesis of tailored hydrodipyrrins and their examination in directed routes to bacteriochlorins and tetradehydrocorrins
作者:Shaofei Zhang、Muthyala Nagarjuna Reddy、Olga Mass、Han-Je Kim、Gongfang Hu、Jonathan S. Lindsey
DOI:10.1039/c7nj01892d
日期:——
dimethoxymethyl, oxo, methoxy, methylthio, iminomethyl, ethoxycarbonylvinyl, dicyanovinyl) substituents have been prepared and examined in the directed synthesis of bacteriochlorins. The routes – inspired by a directed route to chlorins – rely on condensation of two hydrodipyrrins to produce a hydrobilin followed by ring closure to form the macrocycle. Four new unsymmetrically substituted bacteriochlorins
还原的四吡咯的化学作用不如完全不饱和的(卟啉)类似物,但鉴于水卟啉的天然作用(例如,,叶绿素,细菌叶绿素)和收缩型卟啉(钴胺素)。1-(二甲氧基甲基)-2,3-二氢-3,3-二甲基联吡啶(称为二氢联吡啶-乙缩醛)的自缩合提供了相应的细菌二氢卟啉或四氢脱氢corrin,其结果可能通过选择催化条件来控制。在仿生研究中,必须在合成大环的周围安装不同类型的取代基,这是必不可少的。在此,有18种新的靶标(和9种中间产物)氢双吡咯啉,涵盖一定范围的双吡啶饱和水平(二氢,四氢,六氢),并配备了多种α-吡咯(-H,-SMe,-SPh,-Br,-Me,-CO 2个已经制备了R,二氧杂硼硼烷基)和α-吡咯啉(甲基,甲酰基,二甲氧基甲基,氧代,甲氧基,甲硫基,亚氨基甲基,乙氧基羰基乙烯基,双氰基乙烯基)取代基,并在细菌绿素的定向合成中进行了研究。这些路线(受定向生成二氢卟酚的启发)依赖于两种氢二吡咯啉的缩合反应