Multi-step reaction with 6 steps
1: sodium hydrogencarbonate / isopropyl alcohol / 85 °C
2: toluene-4-sulfonic acid / toluene / Heating / reflux
3: lithium hydroxide; water / methanol / 1 h / Heating / reflux
4: 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide; triethylamine / tetrahydrofuran; ethyl acetate / 20 °C
5: tetrahydrofuran; diethyl ether / 1 h / 0 °C
6: bromine / hydrogen bromide / water; acetic acid / 61.67 h / 23 - 40 °C
With
lithium hydroxide; water; bromine; sodium hydrogencarbonate; toluene-4-sulfonic acid; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide; triethylamine;
hydrogen bromide;
In
tetrahydrofuran; methanol; diethyl ether; water; acetic acid; ethyl acetate; isopropyl alcohol; toluene;