Triethylamine → 3-(3,6-Dibromo-9H-carbazol-9-yl)-2-hydroxy-N-(3-methoxyphenyl)-propanamide

HRID 62184Notes

Reaction equation

[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[N:6]([CH2:16][CH:17]([OH:21])[C:18](O)=[O:19])[C:7]3[C:12]([C:13]=2[CH:14]=1)=[CH:11][C:10]([Br:15])=[CH:9][CH:8]=3.S(Cl)(Cl)=O.[CH3:26][O:27][C:28]1[CH:33]=[CH:32][CH:31]=[C:30]([NH2:34])[CH:29]=1.CCN(CC)CC>C(Cl)Cl>[Br:15][C:10]1[CH:9]=[CH:8][C:7]2[N:6]([CH2:16][CH:17]([OH:21])[C:18]([NH:34][C:30]3[CH:31]=[CH:32][CH:33]=[C:28]([O:27][CH3:26])[CH:29]=3)=[O:19])[C:5]3[C:13]([C:12]=2[CH:11]=1)=[CH:14][C:2]([Br:1])=[CH:3][CH:4]=3

Participants

Conditions

Temperature: 0 °C

Procedure

3-(3,6-Dibromo-9H-carbazol-9-yl)-2-hydroxypropanoic acid (0.025 g, 0.061 mmol) was suspended in anhydrous CH2Cl2 and cooled to 0° C. Thionyl chloride (0.005 mL, 0.073 mmol) was added dropwise and the reaction was stirred at 0° C. for 1 h. m-Anisidine (0.008 mL, 0.073 mmol) and Et3N (0.010 mL, 0.073 mmol) were added and the reaction was allowed to warm to ambient temperature over 2.5 h. Upon completion, the solution was partitioned between EtOAc and H2O. The aqueous layer was washed 3× with EtOAc, and the combined organics were washed with saturated aqueous NaCl, dried over Na2SO4, filtered, and concentrated in vacuo. The crude residue was purified by chromatography (SiO2, 0-30% EtOAc/Hexane) to afford the desired product (15 mg, 48%).

Workup

additionwere added
temperatureto warm to ambient temperature over 2.5 h
customUpon completion, the solution was partitioned between EtOAc and H2O
washThe aqueous layer was washed 3× with EtOAc
washthe combined organics were washed with saturated aqueous NaCl
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated in vacuo
customThe crude residue was purified by chromatography (SiO2, 0-30% EtOAc/Hexane)

Sources & evidence

ORD record: ord-4c971829fe1746abb3dbf0ef613b4d82
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09446042B2

Reaction notes

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