The regioselectivity and synthetic mechanism of 1,2-benzimidazole squaraines: combined experimental and theoretical studies
作者:Guomin Xia、Zhiwei Wu、Yanli Yuan、Hongming Wang
DOI:10.1039/c3ra43608j
日期:——
In this paper, a synthetic method to produce 1,2-benzimidazole squaraines with a yield of up to 89% is developed. It is found that both strong organic and inorganic bases have a satisfactory catalytic activity for this reaction. Theoretical studies provide detailed explanations for the 1,2 versus 1,3 condensation regiochemistry of the squaraines. The experimental and theoretical studies agree well with each other, paving a practical way to efficiently synthesize 1,2-squaraines.
本文中,开发了一种合成1,2-苯并咪唑方形酸的合成方法,产率高达89%。研究发现,强有机和无机碱均对该反应表现出良好的催化活性。理论研究为方形酸的1,2与1,3临位缩合区域化学提供了详细的解释。实验研究和理论研究相互印证,为高效合成1,2-方形酸提供了切实可行的途径。