Multi-step reaction with 5 steps
1.1: N-ethyl-N,N-diisopropylamine / dichloromethane / -30 - 20 °C
2.1: N-ethyl-N,N-diisopropylamine / dimethyl sulfoxide / 20 °C / Inert atmosphere
3.1: trifluoroacetic acid / dichloromethane / 2.5 h / 60 °C
4.1: 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide; triethylamine / dichloromethane; ethyl acetate / 20 °C
5.1: dichloromethane / 0.5 h
5.2: 2 h / 20 °C
With
2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide; triethylamine; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid;
In
dichloromethane; dimethyl sulfoxide; ethyl acetate;