Multi-step reaction with 8 steps
1: 54.9 percent / 20percent aq. NaOH / tetrabutylammonium bromide / CH2Cl2 / 96 h / Ambient temperature
2: 3 M trifluoroacetic acid / 0.5 h / Heating
3: pyridine
4: 0.05 M NaOCH3 / methanol / 0.03 h / Heating
5: 1) trimethylsilyl chloride, 2) silver triflate, 1,1,3,3-N-tetramethylurea / 1) 120 deg C, 6 h, toluene, 2) CH2Cl2, 3 h, room temperature
6: 76.7 percent / 0.1 M NaOCH3 / methanol / 0.08 h / Heating
7: 45.1 percent / silver triflate, 1,1,3,3-tetra-N-methylurea / CH2Cl2 / Ambient temperature
8: 60 percent / H2 / 10percent Pd-C / ethanol / 35 °C
With
pyridine; sodium hydroxide; chloro-trimethyl-silane; hydrogen; sodium methylate; silver trifluoromethanesulfonate; trifluoroacetic acid; tetramethylurea;
palladium on activated charcoal; tetrabutylammomium bromide;
In
methanol; ethanol; dichloromethane;
DOI:10.1271/bbb1961.55.2123