Diethylene Glycol/NaBr Catalyzed CO
<sub>2</sub>
Insertion into Terminal Epoxides: From Batch to Continuous Flow
作者:Davide Rigo、Roberto Calmanti、Alvise Perosa、Maurizio Selva、Giulia Fiorani
DOI:10.1002/cctc.202002010
日期:2021.4.21
quantitative formation of the cyclic organic carbonate products (COCs) were achieved at T=100 °C and p0(CO2)=1–40 bar. The process was then transferred to continuous‐flow (CF) mode. The effects of the reaction parameters (T, p(CO2), catalyst loading, and flow rates) were studied using microfluidic reactors of capacities variable from 7.85 ⋅ 10−2 to 0.157 cm3. Albeit the CF reaction took place at T=220 °C and
在二元均相混合物中,在末端环氧化物(苯乙烯氧化物,1,2-环氧己烷和丁基缩水甘油醚)上进行CO 2插入反应,该混合物包括NaBr作为亲核催化剂和二甘醇(DEG)作为溶剂和催化剂活化剂(阳离子配位剂) )。最初在间歇条件下在高压釜和玻璃反应器中研究了该反应方案:在T = 100°C和p 0(CO 2)= 1–40 bar的条件下定量形成了环状有机碳酸酯产物(COC)。然后将过程转移到连续流(CF)模式。反应参数的影响(T,p(CO 2),催化剂负载和流速)使用容量从7.85⋅10 -2到0.157 cm 3可变的微流体反应器进行了研究。尽管CF反应在T = 220°C和120 bar下进行,但CF提高了生产率,并允许催化剂通过半连续萃取程序进行再循环。对于1,2-环氧己烷的模型案例,相应的碳酸盐4-丁基-1,3-二氧戊环-2-酮的(未优化)生成速率增加到27.6 mmol h -1当量。-1,该值比批处理模式下高2