Optically active dihydropyrans and 3-methylenetetrahydrofurans from cyclopropenylethanol derivatives
                                
                                    
                                        作者:Juma'a R.Al-Dulayymi、Mark S. Baird                                    
                                    
                                        DOI:10.1016/s0040-4020(01)87769-3
                                    
                                    
                                        日期:1990.1
                                    
                                    Reaction of a number of 2-(cycloprop-1-en-1-yl)ethanol derivatives with bromine, acid or silver ion leads to ring expansion, either to 5,6-dihydro 2H-pyrans or to 3-methylenetetrahydrofurans.
                                    许多2-(环丙-1-烯-1-基)
乙醇衍
生物与
溴,酸或
银离子的反应导致环膨胀,生成5,6-二氢
2H-吡喃或生成3-亚甲基
四氢呋喃。