Multi-step reaction with 7 steps
1.1: o-xylene / 20 h / 155 - 160 °C
2.1: bromine / dichloromethane; methanol / 2.33 h
3.1: N,N-diethylaniline; trichlorophosphate / 16 h / 120 °C
4.1: copper(I) bromide / tetrahydrofuran / 1.08 h
4.2: 1 h
5.1: (3aR)-1-methyl-3,3-diphenyl-tetrahydro-pyrrolo[1,2-c][1,3,2]oxazaborole; benzo[1,3,2]dioxaborole / toluene; tetrahydrofuran / 0.67 h / -35 °C
5.2: 0.5 h
6.1: perchloric acid / dichloromethane / 2 h / 20 °C
7.1: sodium hydroxide; methanol / 16 h / 60 °C
With
methanol; perchloric acid; bromine; N,N-diethylaniline; sodium hydroxide; (3aR)-1-methyl-3,3-diphenyl-tetrahydro-pyrrolo[1,2-c][1,3,2]oxazaborole; trichlorophosphate; benzo[1,3,2]dioxaborole;
copper(I) bromide;
In
tetrahydrofuran; methanol; dichloromethane; o-xylene; toluene;