Formic Acid → 8-Chloro-1-(3,4,5,6-tetrahydro-2H-[1,2']bipyridinyl-4-yl)-4H,6H-2,3,5,10b-tetraaza-benzo[e]azulene-5-carbaldehyde
Reaction equation
[Cl:1][C:2]1[CH:27]=[CH:26][C:5]2[N:6]3[C:10]([CH2:11][NH:12][CH2:13][C:4]=2[CH:3]=1)=[N:9][N:8]=[C:7]3[CH:14]1[CH2:19][CH2:18][N:17]([C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][N:21]=2)[CH2:16][CH2:15]1.[CH:28](O)=[O:29]>>[Cl:1][C:2]1[CH:27]=[CH:26][C:5]2[N:6]3[C:10]([CH2:11][N:12]([CH:28]=[O:29])[CH2:13][C:4]=2[CH:3]=1)=[N:9][N:8]=[C:7]3[CH:14]1[CH2:15][CH2:16][N:17]([C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][N:21]=2)[CH2:18][CH2:19]1Participants
3
Procedure
A solution of the amine from example 4 (300 mg, 0.79 mmol) in formic acid (15 ml) was stirred at 80° C. for 3 hours. The cooled mixture was concentrated under reduced pressure and the residue was partitioned between ethyl acetate and sodium bicarbonate solution. The layers were separated, and the organic phase was evaporated under reduced pressure to give the title compound.