A versatile synthesis of bis[2-(2′-hydroxylphenyl)benzoxazole] derivatives as zinc sensors
作者:Junfeng Wang、Yi Pang
DOI:10.1039/c3ra41080c
日期:——
A versatile synthetic route has been developed to prepare 2, 5-bis(benzoxazole-2-yl)benzene-1,4-diol derivatives 2. Although one of the derivatives (2b) has recently been shown to exhibit an excellent response to Zn2+ cations, the low yielding synthetic route will likely prevent its wide application. This report describes an improved synthetic procedure to obtain 2, thereby making this class of compounds available for biologically relevant studies. An effective synthesis has been developed for 2-aminophenol derivative 6, which bears a carboxylate group in the desired position. The strategy allows construction of bis(benzoxazole) compound 5, where the built-in ester group can be easily converted to either a hydroxymethyl or a bromomethyl group to introduce the zinc-chelating ligand.
我们开发了一种多功能合成路线来制备 2,5-双(苯并恶唑-2-基)苯-1,4-二醇衍生物 2。虽然其中一种衍生物(2b)最近已被证明对 Zn2+ 阳离子有极好的反应,但低产的合成路线可能会阻碍它的广泛应用。本报告介绍了获得 2 的改进合成程序,从而使这一类化合物可用于生物相关研究。2-aminophenol 衍生物 6 的有效合成方法已经开发出来,该衍生物在所需位置带有一个羧基。这种策略可以构建双(苯并恶唑)化合物 5,其中内置的酯基可以很容易地转化为羟甲基或溴甲基,从而引入锌螯合配体。