Triethyl phosphite → 2,7-Dimethoxy-9H-carbazole
Reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]2[CH:14]=[CH:13][C:12]([O:15][CH3:16])=[CH:11][CH:10]=2)=[C:5]([N+:17]([O-])=O)[CH:4]=1.P(OCC)(OCC)OCC>CCOCC>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]2[C:9]3[C:14](=[CH:13][C:12]([O:15][CH3:16])=[CH:11][CH:10]=3)[NH:17][C:5]=2[CH:4]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 90 °C
Procedure
Compound 39 (8.47 g) was divided into eight portions (1.06 g each). Then, P(OEt)3 (per 7 mL) was added to each portion. The resulting mixtures were subjected to argon blow, heated to 90° C., kept at this temperature for 3 days, cooled, and diluted with ether. The precipitate obtained was filtered and washed with CH2Cl2. Yield of carbazole 40: 3.33 g.