Multi-step reaction with 9 steps
1.1: potassium hydroxide / ethanol; water / 4 h / Reflux
1.2: pH 3
2.1: benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride / tetrahydrofuran / 24 h / 20 °C / Inert atmosphere
3.1: dmap / acetonitrile / 16 h / 20 °C / Inert atmosphere
4.1: 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; lithium diisopropyl amide / tetrahydrofuran; hexane / 8 h / -78 °C / Inert atmosphere
5.1: dichloromethane / 2 h / 0 - 20 °C / Inert atmosphere
6.1: triethylamine / tetrahydrofuran / 14 h / 20 °C / Inert atmosphere
7.1: trifluoroacetic acid / acetonitrile / 0.25 h / Reflux
8.1: aluminum (III) chloride / dichloromethane / 24 h / 20 °C / Inert atmosphere
8.2: 20 °C
9.1: aluminum (III) chloride; methoxybenzene / 5 h / 100 °C / Inert atmosphere
With
dmap; 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; aluminum (III) chloride; benzotriazol-1-ol; methoxybenzene; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine; trifluoroacetic acid; potassium hydroxide; lithium diisopropyl amide;
In
tetrahydrofuran; ethanol; hexane; dichloromethane; water; acetonitrile;
7.1: Friedel-Crafts cyclization;
DOI:10.1016/j.bmc.2011.06.056