Water → HCID 11268439, compound

HRID 751369Notes

Reaction equation

[C:1]([C:5]1[CH:10]=[CH:9][C:8]([N:11]2[C:19]3[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=3)[C:13]([CH:20]=[O:21])=[C:12]2Cl)=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2].[NH:23]1[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]1.O>O1CCOCC1>[C:1]([C:5]1[CH:10]=[CH:9][C:8]([N:11]2[C:19]3[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=3)[C:13]([CH:20]=[O:21])=[C:12]2[N:23]2[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]2)=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2]

Participants

Conditions

Temperature: 110 °C

Procedure

A mixture of 1-(4-tert-butylphenyl)-2-chloro-1H-indole-3-carboxaldehyde (2.95 g, 9.46 mmol), piperazine (10.60 g, 123 mmol) in dioxane (50 mL) is heated overnight at 110° C. Water is added and the reaction mixture is extracted with ethyl acetate. The combined ethyl acetate layers are washed with brine, dried and concentrated. The crude material is purified by chromatography eluting with dichloromethane-5% methanol. Fractions containing product are combined and concentrated to afford 1-(4-tert-butylphenyl)-2-piperazin-1-yl-1H-indole-3-carboxaldehyde (2.4 g, 70% yield) as a light cream solid. TLC (silica gel, dichloromethane-10% methanol) Rf 0.27; ESI/MS 362 (M+H), RT 3.27 min; NMR 10.14 (1H, s); 8.12 (1H, d, J=3 Hz); 8.09 (2H, d); 7.68 (2H, d); 7.47 (2H, m); 6.91 (1H, d, J=6 Hz); 3.20 (4H, m); 2.53 (4H, m); 2.25 (1H, br s); 1.36 (9H, s).

Workup

extractionthe reaction mixture is extracted with ethyl acetate
washThe combined ethyl acetate layers are washed with brine
customdried
concentrationconcentrated
customThe crude material is purified by chromatography
washeluting with dichloromethane-5% methanol
additionFractions containing product
concentrationconcentrated

Sources & evidence

ORD record: ord-ed89add86ba348ada8428ea840de182e
Source dataset: uspto-grants-2008_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07405300B2

Reaction notes

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