A series of dehydroamino acids endowed with different protective groups at the amino and carboxylate moieties and with different substituents at the double bond have been reacted with parahydrogen. The observed ParaHydrogen Induced Polarization (PHIP) effects in the 1H NMR spectra are strongly dependent on the aminoprotectinggroup. DFT calculations allowed us to establish a relationship between the
使在氨基和羧酸酯部分具有不同保护基并且在双键具有不同取代基的一系列脱氢氨基酸与对氢反应。在1 H NMR光谱中观察到的副氢诱导极化(PHIP)效应强烈依赖于氨基保护基。DFT计算使我们能够建立反应中间体的结构(其能量取决于酰胺取代基)与观察到的PHIP模式之间的关系。
Synthesis of α-C-Glucosylated Derivatives of α-Amino Carboxylic Acids α-C-Glucosylation of amino acids was achieved by the reaction of ketene acetals 3 with the α-glucosyl bromide 4b in presence of zinc bromide to yield the β-anomers of the α-glucosyl-α-amino acid derivatives 6.