Triethyl phosphite → 5H-benzofuro[3,2-c]carbazole

Participants

Reaction Steps

20 g of 4-(2-nitrophenyl)dibenzofuran (69 mmol) and 48 ml of triethyl phosphite (276 mmol) are heated at the boil in 800 ml of 1,2-dichlorobenzene under a protective-gas atmosphere for 48 h. After this time, the remaining triethyl phosphite and the 1,2-dichlorobenzene are removed by distillation. The residue which remains is recrystallised from heptane/ethyl acetate. The yield is 13 g (45 mmol, 65%).

Provenance & Evidence