A formation of optically active oxetanes from sugars by Boron trifluoride catalyzed [2+2]cycloaddition reaction
                                
                                    
                                        作者:Hideyuki Sugimura、Kenji Osumi                                    
                                    
                                        DOI:10.1016/s0040-4039(00)99522-4
                                    
                                    
                                        日期:1989.1
                                    
                                    Boron trifluoride etherate catalyzed the formal [2+2]cycloaddition of 2,3--isopropylidene derivatives of with enol ethers, vinyl sulfide, and disubstituted terminal olefins to afford chiral oxetanes.
                                    三氟化硼醚化物与烯醇醚,
乙烯基硫化物和二取代的末端烯烃催化2,3-异亚丙基衍
生物的形式[2 + 2]环加成反应,得到手性氧杂
环丁烷。