Multi-step reaction with 4 steps
1: 1.) lithium diisopropylamide, 2.) 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidone (DMPU) / 1.) THF, -78 deg C, 45 min, 2.) THF, a) -78 deg C, 30 min, b) RT, 18 h
2: 1.) lithium diisopropylamide / 1.) hexane, THF, -78 deg C, 45 min, 2.) hexane, THF, -78 deg C, 1 h
3: 1.) ozone, 2.) PPh3 / 1.) CH2Cl2, -78 deg C, 10 min, 2.) CH2Cl2, RT, 5 h
4: 86 percent / BF3*OEt2 / CH2Cl2 / 0.17 h / -78 °C
With
1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; boron trifluoride diethyl etherate; ozone; triphenylphosphine; lithium diisopropyl amide;
In
dichloromethane;