Supplementary material to "Flow Synthesis of Cyclobutanones via [2+2] Cycloaddition of Keteneiminium Salts and Ethylene Gas"

A flow chemistry process for the synthesis of 2-substituted cyclobutanones, via [2+2] cycloaddition of keteneiminium salts and ethylene gas, is reported.本研究报道了一种以烯酮亚胺盐与乙烯气体通过[2+2]环加成反应合成2-取代环丁酮的流动化学工艺。