Multi-step reaction with 11 steps
1: 1) CH3ONa, 2) toluene-4-sulfonic acid / 1) CH3OH, 2 h, 2) CH3CN, 50 deg C
2: pyridine / 20 h
3: NaBH3CN, HCl / tetrahydrofuran; diethyl ether / 8 h / 20 °C / molecular sieve 3 Angstroem
4: CH3ONa / methanol / 24 h
5: mercury cyanide / nitromethane; benzene / 2 h / 50 - 60 °C / molecular sieve 4 Angstroem
6: CH3ONa / methanol / 15 h
7: toluene-4-sulfonic acid / acetonitrile / 0.5 h / 50 °C
8: pyridine / 15 h
9: 1) NaBH3CN, 2) HCl / 1) THF, molecular sieve 3 Angstroem, 2 h, 2) ether, 8 h
10: CH3ONa / methanol / 15 h
11: toluene-4-sulfonic acid / CH2Cl2 / 0.17 h / 20 °C
With
pyridine; hydrogenchloride; sodium methylate; mercury(II) cyanide; sodium cyanoborohydride; toluene-4-sulfonic acid;
In
tetrahydrofuran; methanol; diethyl ether; nitromethane; dichloromethane; acetonitrile; benzene;
DOI:10.1007/BF00598177