Multi-step reaction with 7 steps
1: 48 percent / PCC, NaOAc / tetrahydrofuran / 2 h / 25 °C
2: 1.) 18-crown-6-ether, KN(SiMe3)2 / 1.) THF, toluene, -78 deg C, 10 min, 2.) THF, toluene, 30 min
3: 69 percent / (i-Bu)2AlH/toluene / CH2Cl2 / 1 h / -78 °C
4: 86 percent / LiCl, MeSO2Cl, collidine / dimethylformamide / 1.5 h / Ambient temperature
5: 1.) NaH / 1.) DMF, THF, 30 min, room t., 2.) DMF, THF, 3 h, room t.
6: 83 percent / K2CO3 / methanol / 24 h / Ambient temperature
7: 100 percent / pyridine / CH2Cl2 / 0.5 h / 0 °C
With
pyridine; 2,3,5-trimethyl-pyridine; 18-crown-6 ether; sodium acetate; potassium hexamethylsilazane; sodium hydride; diisobutylaluminium hydride; potassium carbonate; methanesulfonyl chloride; toluene; pyridinium chlorochromate; lithium chloride;
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide;
DOI:10.1139/v96-017