A Colorimetric Method for Quantifying
<i>Cis</i>
and
<i>Trans</i>
Alkenes Using an Indicator Displacement Assay
作者:Stephanie A. Valenzuela、Hannah S. N. Crory、Chao‐Yi Yao、James R. Howard、Gabriel Saucedo、A. Prasanna Silva、Eric V. Anslyn
DOI:10.1002/anie.202101004
日期:2021.6.14
esters, thus displacing the indicator to a greater extent. The generality of the protocol was demonstrated using seven sets of cis and trans alkenes. Blind mixtures of cis and trans alkenes were made, resulting in an average error of ±2 % in the percentage of cis or trans alkenes, and implementing E2 and Wittig reactions gave errors of ±3 %. Furthermore, we developed variants of the IDA for which the color
开发了一种适用于高通量实验的比色指示剂置换测定法 (IDA) 以确定顺式和反式烯烃的百分比。使用 96 孔板进行两个步骤:用于烯烃二羟基化的反应板,然后是由指示剂和硼酸组成的 IDA 筛选板。取决于它们的顺加成或反加成机制,二羟基化从顺式或反式烯烃生成赤型或苏型邻位二醇。三重奏由于产生更稳定的硼酸酯,二醇优先与硼酸结合,从而在更大程度上取代指示剂。使用七组顺式和反式烯烃证明了该协议的一般性。制备顺式和反式烯烃的盲混合物,导致顺式或反式烯烃百分比的平均误差为 ±2% ,实施 E 2和 Wittig 反应的误差为 ±3%。此外,我们开发了 IDA 的变体,可以对其颜色进行调整以优化人眼的响应。