Multi-step reaction with 4 steps
1: 1,8-diazabicyclo[5.4.0]undec-7-ene / tetrahydrofuran; methanol / 70 °C
2: N-ethyl-N,N-diisopropylamine; diphenyl phosphoryl azide / toluene / 5 h / 100 °C
3: trifluoroacetic acid / dichloromethane / 20 °C
4: N-ethyl-N,N-diisopropylamine; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide / dichloromethane / 1 h / 20 °C
With
diphenyl phosphoryl azide; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide; 1,8-diazabicyclo[5.4.0]undec-7-ene; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid;
In
tetrahydrofuran; methanol; dichloromethane; toluene;