Multi-step reaction with 5 steps
1: oxalyl chloride, DMF / CH2Cl2 / 3 h / 0 °C
2: NEt3, DMAP / CH2Cl2 / 3 h
3: 54 percent / Bu4NOH, NaI, NaOH, H2O / CH2Cl2 / 17 h / 25 °C
4: 88 percent / TBAF / tetrahydrofuran / 0.25 h / 25 °C
5: 1.) 1,8-bis(dimethylamino)naphthalene, POCl3, 2.) tributylammonium pyrophosphate, NBu3 / 1.) trimethyl phosphate, 0 deg C, 140 min, 2.) trimethyl phosphate, DMF, 0 deg C, 5 min
With
dmap; sodium hydroxide; oxalyl dichloride; tributyl-amine; tetrabutyl ammonium fluoride; tetra(n-butyl)ammonium hydroxide; water; N,N,N',N'-tetramethyl-1,8-diaminonaphthalene; tri(n-butyl)ammonium pyrophosphate; triethylamine; N,N-dimethyl-formamide; sodium iodide; trichlorophosphate;
In
tetrahydrofuran; dichloromethane;
DOI:10.1002/(SICI)1521-3765(19990301)5:3<951::AID-CHEM951>3.0.CO;2-G