Serendipitous Observation of Liquid-Phase Size Selectivity inside a Mesoporous Silica Nanoreactor in the Reaction of Chromene with Formic Acid
作者:Paramita Das、Suman Ray、Piyali Bhanja、Asim Bhaumik、Chhanda Mukhopadhyay
DOI:10.1002/cctc.201701975
日期:2018.5.24
product switches from pyrimidine to enol lactones and δ‐keto acids inside the nanoreactor. The shape/size selectivity in the liquid phase is a highly desired phenomenon in organic synthesis. We prepared four different varieties of porous silica materials to obtain this product selectivity. Very high yields of these biologically relevant compounds surpass that achieved by existing methodologies. Again
在液相色谱中,作为纳米反应器的MCM-41内,在色烯与甲酸的水解/脱羧反应序列中,观察到了前所未有的产品形状/尺寸选择性。预计烯会在与HCOOH的反应中形成嘧啶。然而,在此偶然地,产物从嘧啶变为烯醇内酯和δ纳米反应器内部的酮酸。液相中的形状/尺寸选择性是有机合成中非常需要的现象。我们准备了四种不同的多孔二氧化硅材料,以获得这种产品的选择性。这些生物学上相关的化合物的非常高的产率超过了现有方法所获得的产率。再次,尽管很少有香豆素融合的烯醇内酯的报道,但是这种方法可以轻松合成萘融合的烯醇内酯。此外,这是在许多水解/脱羧/开环/互变异构/脱羧步骤之后的第一个δ-酮酸的一般合成方法。