Acetic Acid → HCID 18780264, compound

HRID 1421169Notes

Reaction equation

C(O)(=O)C.[NH2:5][CH2:6][CH2:7][CH2:8][N:9]1[C:17]2[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=2)[C:11]([C:18]2[C:19](=[O:34])[NH:20][C:21](=[O:33])[C:22]=2[C:23]2[C:31]3[C:26](=[CH:27][CH:28]=[CH:29][CH:30]=3)[N:25]([CH3:32])[CH:24]=2)=[CH:10]1.C(O)(=O)C.C(=O)(O)[O-].[Na+].Cl[C:45]1[C:50]([N+:51]([O-:53])=[O:52])=[CH:49][CH:48]=[CH:47][N:46]=1>CS(C)=O.O>[CH3:32][N:25]1[C:26]2[C:31](=[CH:30][CH:29]=[CH:28][CH:27]=2)[C:23]([C:22]2[C:21](=[O:33])[NH:20][C:19](=[O:34])[C:18]=2[C:11]2[C:12]3[C:17](=[CH:16][CH:15]=[CH:14][CH:13]=3)[N:9]([CH2:8][CH2:7][CH2:6][NH:5][C:45]3[C:50]([N+:51]([O-:53])=[O:52])=[CH:49][CH:48]=[CH:47][N:46]=3)[CH:10]=2)=[CH:24]1

Participants

Conditions

Temperature: 100 °C

Procedure

A solution of 100 mg of 3-[1-(3-aminopropyl)-3-indolyl]-4-(1-methyl-3-indolyl)-1H-pyrrole-2,5-dione acetate, containing an extra equivalent of acetic acid, in 10 ml of dimethyl sulphoxide (DMSO) was treated with 35 mg of sodium bicarbonate and 36 mg of 2-chloro-3-nitropyridine. The mixture was heated at 60° C. for 1 hour and at 100° C. for 2 hours. The solution was allowed to cool, water was added and the precipitate was filtered off and chromatographed on silica gel with 1% to 5% methanol in dichloromethane. The product was purified further by crystallization from hexane/ethyl acetate to give 60 mg of 3-(1-methyl-3-indolyl)-4-[1-[3-(3-nitro-2-pyridylamino)propyl]-3-indolyl]-1H-pyrrole-2,5-dione, m.p. 218°-220° C.

Workup

temperatureto cool
filtrationthe precipitate was filtered off
customchromatographed on silica gel with 1% to 5% methanol in dichloromethane
customThe product was purified further by crystallization from hexane/ethyl acetate

Sources & evidence

ORD record: ord-35f99b7dab8d4289b42bd88eb966f3ad
Source dataset: uspto-grants-2000_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: USRE036736

Reaction notes

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