Oxidation of Alcohols to Carbonyl Compounds with CrO<sub>3</sub>·SiO<sub>2</sub> in Supercritical Carbon Dioxide
作者:María Elena González-Núñez、Rossella Mello、Andrea Olmos、Rafael Acerete、Gregorio Asensio
DOI:10.1021/jo052137j
日期:2006.2.1
Supercritical carbon dioxide (scCO2) is an effective reaction medium to perform the oxidation of primary and secondaryaliphaticalcohols to the corresponding carbonyl compounds with chromium trioxide supported on silica. These reactions were performed by flowing a solution of the alcohol in scCO2 through a column containing the supported reagent and recovering the product by depressurization. This
超临界二氧化碳(sc CO 2)是一种有效的反应介质,可利用负载在二氧化硅上的三氧化铬将伯和仲脂族醇氧化为相应的羰基化合物。通过使醇在sc CO 2中的溶液流过含有负载的试剂的柱并通过减压回收产物来进行这些反应。这种方法避免了使用有机溶剂,避免了产品被铬污染。
Trost; Tometzki, Synthesis, 1991, # 12, p. 1235 - 1245
作者:Trost、Tometzki
DOI:——
日期:——
Direct Synthesis of Free α-Amino Acids by Telescoping Three-Step Process from 1,2-Diols
of α-amino acids from the corresponding 1,2-diols has been developed. This process enables the directsynthesis of free α-amino acids without any protection/deprotection step. This method was also effective for the preparation of a 15N-labeled α-amino acid. 1,2-Diols bearing α,β-unsaturated ester moieties afforded bicyclic α-amino acids through intramolecular [3 + 2] cycloadditions. A preliminary study