Multi-step reaction with 7 steps
1: 86 percent / Et3N / CH2Cl2 / -78 deg C, 30 min then RT
2: 1) 1-propanephosphonic acid anhydride, Et3N, 2) NH3 / 1) CH2Cl2, 0 deg C, 2) CH2Cl2, 5 min, 0 deg C
3: 97 percent / oxone / H2O; methanol / 2 h / Ambient temperature
4: 1) Ph2Se2, Na, 2) 18-crown-6 / 1) THF, 24 h, reflux, 2) THF, 24 h, RT
5: 71 percent / PPh3, CCl4 / 18 h / Ambient temperature
6: 1) t-BuOK / 1) THF, 2) THF, 3) THF, 1 h, RT
7: 1) POCl3, 3) NaOAc, H2O / 1) 15 deg C, 15 min, 2) DMF, 90 deg C, 45 min 3) 90 deg C, 15 min
With
tetrachloromethane; Oxone; 18-crown-6 ether; diphenyl diselenide; potassium tert-butylate; ammonia; water; sodium acetate; sodium; 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide; triethylamine; triphenylphosphine; trichlorophosphate;
In
methanol; dichloromethane; water;
DOI:10.1055/s-1997-942