Multi-step reaction with 9 steps
1: piperidine; acetic acid / toluene / Inert atmosphere; Reflux
2: 3-ethyl-5-(2-hydroxyethyl)-4-methyl-1,3-thiazolium bromide; triethylamine / 70 °C / Inert atmosphere
3: acetic acid / methanol / 24 h / 65 °C / Inert atmosphere; Sealed tube
4: sodium hydroxide / 1,4-dioxane; ethanol; water / Reflux; Inert atmosphere
5: copper(l) iodide; potassium carbonate; L-proline / dimethyl sulfoxide / 80 °C / Inert atmosphere
6: palladium 10% on activated carbon; hydrogen / methanol; dichloromethane / 0.5 h / 20 °C / Inert atmosphere
7: pyridine / 0.5 h / 0 °C / Inert atmosphere
8: N-ethyl-N,N-diisopropylamine / N,N-dimethyl-formamide / Inert atmosphere
9: trifluoroacetic acid / dichloromethane / 0.25 h / Inert atmosphere
With
piperidine; pyridine; copper(l) iodide; palladium 10% on activated carbon; hydrogen; 3-ethyl-5-(2-hydroxyethyl)-4-methyl-1,3-thiazolium bromide; potassium carbonate; acetic acid; triethylamine; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid; L-proline; sodium hydroxide;
In
1,4-dioxane; methanol; ethanol; dichloromethane; water; dimethyl sulfoxide; N,N-dimethyl-formamide; toluene;
3: Paal-Knorr pyrrole synthesis;
DOI:10.1021/jm300608w