作者:Soumit Chatterjee、Peter Karuso
DOI:10.1016/j.tetlet.2016.10.021
日期:2016.11
A series of GFP analogues, which are fluorescent in the solid state at room temperature, but weakly fluorescent in solution, have been synthesized via an oxazolone formation process that involves a condensation reaction in the presence of a Lewis acid following a Knoevenagel condensation. A ring opened intermediate is formed which cyclizes readily upon heating to produce the imidazolinone. This method
已经通过恶唑酮形成过程合成了一系列GFP类似物,其在室温下在固态下是荧光的,但是在溶液中却是弱荧光的,该过程涉及在Knoevenagel缩合之后在路易斯酸存在下的缩合反应。形成开环的中间体,该中间体在加热时容易环化以产生咪唑啉酮。与替代方法相比,此方法更快,更简单并且产生更高的产量。一些类似物代表锁定的GFP衍生物,其中环外单键旋转已停止。即使停止单键旋转后,荧光强度仍然很弱,这表明构象限制没有得到有效控制,而双键旋转仅是主要的非辐射途径。