1-Methylpiperazine → 1-[3-(3-Fluoro-piperidin-1-yl)-4-nitro-phenyl]4-methyl-piperazine

HRID 646950Notes

Reaction equation

Cl[C:2]1[CH:3]=[CH:4][C:5]([N+:15]([O-:17])=[O:16])=[C:6]([N:8]2[CH2:13][CH2:12][CH2:11][CH:10]([F:14])[CH2:9]2)[CH:7]=1.[CH3:18][N:19]1[CH2:24][CH2:23][NH:22][CH2:21][CH2:20]1>C(Cl)Cl>[F:14][CH:10]1[CH2:11][CH2:12][CH2:13][N:8]([C:6]2[CH:7]=[C:2]([N:22]3[CH2:23][CH2:24][N:19]([CH3:18])[CH2:20][CH2:21]3)[CH:3]=[CH:4][C:5]=2[N+:15]([O-:17])=[O:16])[CH2:9]1

Participants

Conditions

Temperature: 80 °C

Procedure

A solution of 1-(5-chloro-2-nitro-phenyl)-3-fluoro-piperidine (as prepared in the previous step, 0.44 g, 1.7 mmol) in N-methylpiperazine (2 mL) was heated to 80° C. for 18.5 h. The reaction was cooled to room temperature, diluted with CH2Cl2 and washed with water. The aqueous layer was extracted with CH2Cl2. The combined organic layers were dried over MgSO4 and concentrated in vacuo to afford the title compound (0.50 g, 93%) as a yellow solid. 1H-NMR (CDCl3; 400 MHz): δ 8.00 (d, 1H, J=9.2 Hz), 6.44 (dd, 1H, J=9.2 Hz, J=2.8 Hz), 6.34 (d, 1H, J=2.8 Hz), 4.91-4.71 (m, 1H), 3.54-3.44 (m, 1H), 3.41-3.36 (m, 4H), 3.18-3.10 (m, 1H), 3.02-2.94 (m, 1H), 2.87-2.80 (m, 1H), 2.5-2.52 (m, 4H), 2.35 (s, 3H), 1.82-1.66 (m, 4H). LC-MS (ESI, m/z): Calcd. for C16H23FN4O2 323.2 (M+H), found 323.2.

Workup

temperatureThe reaction was cooled to room temperature
washwashed with water
extractionThe aqueous layer was extracted with CH2Cl2
dry with materialThe combined organic layers were dried over MgSO4
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-5585ce4e157c446eb1bc72ddfcbde5ae
Source dataset: uspto-grants-2010_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07705042B2

Reaction notes

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