Mesoporous poly-melamine-formaldehyde (mPMF) – a highly efficient catalyst for chemoselective acetalization of aldehydes
作者:Mei Xuan Tan、Liuqun Gu、Nannan Li、Jackie Y. Ying、Yugen Zhang
DOI:10.1039/c3gc40297e
日期:——
A mesoporous poly-melamine-formaldehyde polymer with a high surface area, good porosity and a high density of amine and triazine functional groups was investigated as a highly efficient hydrogen-bonding catalyst. This porousorganicpolymer was found to be highly effective in catalyzing chemoselective acetalization of aldehydes, without the consumption of any dehydrating agents. The turnover frequency
Natural deep eutectic solvents promote low-impact acetalization reactions on a wide range of substrates. The reaction medium is fully recycled without weakening of the catalytic activity up to ten times.
Rapid Cyclic Acetal and Cyclic Ketal Synthesis Assisted by a Rotary Evaporator
作者:Fuyao Jiang、Yinzhe Chen、Qian Zhang、Weiding Wang
DOI:10.1055/a-2293-3243
日期:——
Herein, we present a rapid and efficient method for synthesizing cyclicacetals and ketals utilizing a rotary evaporator. Unlike the conventional Dean–Stark dehydration process, which typically demands extended reaction times and copious amounts of organic solvents, our approach affords the synthesis of cyclicacetals and ketals with varying ring sizes in 30 min while using minimal quantities of dimethyl