Multi-step reaction with 12 steps
1: 1.) Red-Al, 2.) NIS / 1.) THF, 0 deg C to room temp., 2.) THF, -78 deg C, 10 min
2: 97 percent / imidazole / tetrahydrofuran / 16 h / Ambient temperature
3: 1.) Zn, CH2(OCH3)2, 2.) 8 molpercent Pd(PPh3)4, DMPU / 1.) reflux, 30 min, 2.) 65 deg C, 4 h
4: p-TSA / ethanol / Ambient temperature
5: 74 percent / DIAD, PPh3, Zn(N3)2*2pyridine / toluene / 3 h / Ambient temperature
6: 75 percent / HF*pyridine / pyridine; acetonitrile / 2.5 h / Ambient temperature
7: 67 percent / DEAD, PPh3 / tetrahydrofuran / 6 h / Ambient temperature
8: H2 / Lindlar catalyst / ethanol / 48 h / Ambient temperature
10: 60 percent / NaN3 / dimethylformamide / 6 h / 50 °C
11: H2 / Lindlar catalyst / ethanol / 4 h / Ambient temperature
12: CH2Cl2 / 16 h / Ambient temperature
With
1H-imidazole; 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; N-iodo-succinimide; tetrakis(triphenylphosphine) palladium(0); sodium azide; Zn(N3)2/bis-pyridine complex; Dimethoxymethane; di-isopropyl azodicarboxylate; hydrogen; toluene-4-sulfonic acid; pyridine hydrogenfluoride; triphenylphosphine; sodium bis(2-methoxyethoxy)aluminium dihydride; zinc; diethylazodicarboxylate;
Lindlar's catalyst;
In
tetrahydrofuran; pyridine; ethanol; dichloromethane; N,N-dimethyl-formamide; toluene; acetonitrile;
DOI:10.1016/S0040-4039(97)00871-X