Multi-step reaction with 8 steps
1.1: toluene-4-sulfonic acid / N,N-dimethyl-formamide / 20 °C / Inert atmosphere
2.1: pyridine; dmap / 0 - 20 °C / Inert atmosphere
3.1: sodium methylate / methanol / 0 - 20 °C / Inert atmosphere
4.1: sodium hydride / N,N-dimethyl-formamide / 0.5 h / 20 °C / Inert atmosphere
4.2: 20 °C / Inert atmosphere
5.1: boron trifluoride diethyl etherate; triethylsilane / dichloromethane / 2 h / 0 °C / Inert atmosphere
6.1: dichloromethane / 0.5 h / 20 °C / Molecular sieve; Inert atmosphere
6.2: 2 h / 0 - 20 °C / Inert atmosphere
7.1: pyridine; hydrogen fluoride / tetrahydrofuran / 0 - 20 °C / Inert atmosphere
8.1: 2,2,6,6-tetramethyl-piperidine-N-oxyl; [bis(acetoxy)iodo]benzene / dichloromethane; water / 20 °C
With
pyridine; triethylsilane; dmap; 2,2,6,6-tetramethyl-piperidine-N-oxyl; [bis(acetoxy)iodo]benzene; boron trifluoride diethyl etherate; hydrogen fluoride; sodium methylate; sodium hydride; toluene-4-sulfonic acid;
In
tetrahydrofuran; methanol; dichloromethane; water; N,N-dimethyl-formamide;
DOI:10.1021/ol500738g