Multi-step reaction with 8 steps
1: 1.) O3, 2.) Et3N / 1.) CH2Cl2, -78 deg C, 2.) CH2Cl2, from -78 deg C to RT
2: 1.) n-BuLi / 1.) THF, hexane, RT, 15 min, 2.) THF, hexane, RT, 18 h
3: 91 percent / H2 / 10percent Pd/C / ethanol / 12 h
4: 94 percent / p-toluenesulfonic acid, H2O / tetrahydrofuran / 18 h / Ambient temperature
5: 1.) (COCl)2, DMSO, 2.) Et3N / 1.) CH2Cl2, -78 deg C, 1 h, 2.) CH2Cl2, 0 deg C, 20 min
6: 1.) t-BuOK / 1.) THF, RT, 30 min, 2.) THF, 1 h
7: 91 percent / ethanethiol, NaH / dimethylformamide / 3 h / Heating
8: 62.7 percent / salcomine, O2 / dimethylformamide / 14 h
With
n-butyllithium; oxalyl dichloride; salcomine; potassium tert-butylate; water; hydrogen; oxygen; sodium hydride; toluene-4-sulfonic acid; ozone; dimethyl sulfoxide; triethylamine; ethanethiol;
palladium on activated charcoal;
In
tetrahydrofuran; ethanol; N,N-dimethyl-formamide;
DOI:10.1248/cpb.41.561