[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[O:14][CH2:13][CH2:12][N:11]3[C:7](=[N:8][C:9](I)=[CH:10]3)[C:6]=2[CH:16]=1.C([Sn](CCCC)(CCCC)[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][N:23]=1)CCC>CN(C=O)C.[Cu](I)I>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[O:14][CH2:13][CH2:12][N:11]3[C:7](=[N:8][C:9]([C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][N:23]=4)=[CH:10]3)[C:6]=2[CH:16]=1A mixture of 9-bromo-2-iodo-4,5-dihydro-6-oxa-1,3a-diazabenzo[e]azulene (200 mg, 0.512 mmol), 2-tributylstannanylpyridine (226 g, 0.614 mmol), Pd2(PPh3)2Cl2 (36 mg, 0.05 mmol) and copper iodide (29 mg, 0.15 mmol) in DMF (4 mL) was purged with nitrogen and then heated at 100° C. for 1 h using microwave irradiation. The reaction mixture was diluted with MeOH (20 mL) and then loaded onto an Isolute® SCX-2 cartridge which was washed with MeOH and the product eluted with 0.5M NH3/MeOH. The product containing fractions were combined and concentrated in vacuo. The resulting residue was purified by column chromatography (Si-PCC, gradient 0-8% MeOH in DCM followed by Si-PCC, gradient 0-7% MeOH in EtOAc) affording the title compound as a cream solid (140 mg, 80%). LCMS: RT 2.52 min [M+H]+ 341.8/343.8.
Wird geladen…
