Multi-step reaction with 5 steps
1: 1.) LiCl, 1,8-diazabicyclo<5.4.0>-7-undecene / 1.) THF, benzene, RT, 10 min, 2.) THF, benzene, RT, overnight
2: KOH / ethanol; H2O / Ambient temperature
3: diphenylphosphorazidate (DPPA), Et3N / dimethylformamide / 1.) -10 deg C, 2 h, 2.) RT, overnight
4: H2 / Pd-black / ethanol
5: diphenylphosphorazidate (DPPA), Et3N / dimethylformamide / 1.) -10 deg C, 2 h, 2.) RT, overnight
With
potassium hydroxide; diphenyl phosphoryl azide; hydrogen; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine; lithium chloride;
palladium;
In
ethanol; water; N,N-dimethyl-formamide;
DOI:10.1248/cpb.40.364