Hydrochloric Acid → HCID 57950448, compound

HRID 1020666Notes

Reaction equation

Cl.[Br:2][C:3]1[CH:11]=[C:10]2[C:6]([C:7]([CH2:12][CH2:13][NH2:14])=[CH:8][NH:9]2)=[CH:5][CH:4]=1.Br[C:16]1[CH:24]=CC=C2[C:17]=1C(CCN)=CN2.[O-]S([O-])(=O)=O.[Na+].[Na+]>CC(C)=O.C(O)CCC>[Br:2][C:3]1[CH:11]=[C:10]2[C:6]([C:7]3[CH2:12][CH2:13][NH:14][C:16]([CH3:24])([CH3:17])[C:8]=3[NH:9]2)=[CH:5][CH:4]=1

Participants

Conditions

Temperature: 60 °C

Procedure

Concentrated HCl (10 mL) was added to a suspension of a 2:1 mixture of 2-(6-bromo-1H-indol-3-yl)ethanamine and 2-(4-bromo-1H-indol-3-yl)ethanamine (9.90 g, 41.4 mmol) and Na2SO4 (30 g) in 1:1 acetone/n-butanol (100 mL). The resulting suspension was heated at 60° C. with stirring for 4 d. The suspension was cooled and concentrated under reduced pressure. The residue was diluted with EtOAc, and the suspension was filtered. The filtrate was washed with saturate NaHCO3 solution, dried over Na2SO4 and concentrated under reduced pressure. Flash chromatography (silica gel, (1:1 EtOAc/hexanes)/(9:0.9:0.1 CH2Cl2/MeOH/NH4OH) 100:0 to 0:100) yielded the title compound (1.68 g, 15%) as a red foam: 1H NMR (500 MHz, CDCl3) δ 7.66 (br s, 1H), 7.45 (d, J=1.5 Hz, 1H), 7.32 (d, J=8.5 Hz, 1H), 7.19 (dd, J=8.5, 1.5 Hz, 1H), 3.20 (t, J=5.5 Hz, 2H), 2.68 (t, J=5.5 Hz, 2H), 1.47 (s, 6H).

Workup

temperatureThe suspension was cooled
concentrationconcentrated under reduced pressure
additionThe residue was diluted with EtOAc
filtrationthe suspension was filtered
washThe filtrate was washed with saturate NaHCO3 solution
dry with materialdried over Na2SO4
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-a463c2a6f1104ac080742ac2ff3078cd
Source dataset: uspto-grants-2014_05
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08716308B2

Reaction notes

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