causes of precipitation and clogging in continuous flow dichlorocyclopropanation, we established that the flow reaction can be performed only with T-junctions and microtubes. Unlike tertiary amines, when quaternary ammonium salts were used as PTCs, precipitation and clogging in microchannels did not occur, and an excellent yield of up to 99% was obtained after optimizing the reaction temperature, reactant
通过分析连续流动二
氯环丙烷反应中沉淀和堵塞的原因,我们确定流动反应只能用T形接头和微管进行。与叔胺不同,使用季
铵盐作为
PTC时,微通道中不会发生沉淀和堵塞,并且在优化反应温度、反应物浓度和保留时间后获得了高达99%的优异收率。在放大实验中,随着微通道内径 (ID) 的增加,反应产率略有下降,但计算出的吞吐量从 2.41 g/h (ID: 1.5 mm) 增加到 3.46 g/h (ID: 1.9)毫米)和 5.13 克/小时(内径:2.4 毫米)