Diisopropylethylamine → 5-Chloro-4-(4-(4-chlorobenzyl)piperazin-1-yl)-3-nitropyridin-2-amine

HRID 416752Notes

Reaction equation

[NH2:1][C:2]1[C:7]([N+:8]([O-:10])=[O:9])=[C:6](Cl)[C:5]([Cl:12])=[CH:4][N:3]=1.[Cl:13][C:14]1[CH:26]=[CH:25][C:17]([CH2:18][N:19]2[CH2:24][CH2:23][NH:22][CH2:21][CH2:20]2)=[CH:16][CH:15]=1.C(N(C(C)C)CC)(C)C>C(O)(C)C>[Cl:12][C:5]1[C:6]([N:22]2[CH2:21][CH2:20][N:19]([CH2:18][C:17]3[CH:25]=[CH:26][C:14]([Cl:13])=[CH:15][CH:16]=3)[CH2:24][CH2:23]2)=[C:7]([N+:8]([O-:10])=[O:9])[C:2]([NH2:1])=[N:3][CH:4]=1

Participants

Conditions

Temperature: 45 °C

Procedure

To a mixture of 2-amino-4,5-dichloro-3-nitropyridine (0.038 g, 0.18 mmol) and isopropanol (3 ml) was added 1-(4-chlorobenzyl)piperazine (0.042 g, 0.20 mmol) with the aid of isopropanol (0.5 ml) followed by diisopropylethylamine (0.035 ml, 0.20 mmol). The reaction mixture was heated at 45° C. for 18 h, then allowed to cool to room temperature, and diluted with isopropanol (4 ml). The precipitate was collected by filtration, washed with isopropanol and diethyl ether. The title compound was thus obtained as a yellow solid (0.034 g, 50%); 1H-NMR (500 MHz, DMSO-d6) 2.48 (br s, obscured by DMSO peak, 4H, piperazine N(CH2)2), 3.06 (br s, 4H, piperazine N(CH2)2), 3.52 (s, 2H, NCH2), 6.95 (s, 2H, NH2), 7.35 (d, J=8.50 Hz, 2H) and 7.38 (d, J=8.55 Hz, 2H) (3,5-ArH and 2,6-ArH), 8.06 (s, 1H, 6-H);

Workup

temperatureto cool to room temperature
filtrationThe precipitate was collected by filtration
washwashed with isopropanol and diethyl ether

Sources & evidence

ORD record: ord-78b17a95faf24082bc9bbdb8cab76067
Source dataset: uspto-grants-2012_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08088761B2

Reaction notes

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