Methanol → Tert-butyl 3-(2-(2-bromophenylamino)-2-oxoethyl)piperazine-1-carboxylate

HRID 1896104

Reaction equation

HRID 1896104 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[NH:8][C:9](=[O:41])[CH2:10][CH:11]1[CH2:16][N:15]([C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:14][CH2:13][N:12]1C(OCC1C2C=CC=CC=2C2C1=CC=CC=2)=O.N1CCNCC1.CO>ClCCl>[Br:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[NH:8][C:9](=[O:41])[CH2:10][CH:11]1[NH:12][CH2:13][CH2:14][N:15]([C:17]([O:19][C:20]([CH3:22])([CH3:21])[CH3:23])=[O:18])[CH2:16]1

Participants

5

Reactant 3

HCID 887MethanolHCID 4837PiperazineHCID 582849301-(9H-fluoren-9-yl)methyl 4-tert-butyl 2-(2-(2-bromophenylamino)-2-oxoethyl)piperazine-1,4-dicarboxylate

Product 1

HCID 58284918Tert-butyl 3-(2-(2-bromophenylamino)-2-oxoethyl)piperazine-1-carboxylate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of Example 1A (8.76 g, 14.12 mmol) in dichloromethane (100 mL) was added piperazine (3.65 g, 42.4 mmol). Methanol (50 mL) was added to the solution for solubility, and the resultant mixture was warmed to 40° C. for 14 hours. Once the reaction was complete, purification via flash chromatography (20-100% ethyl acetate/hexanes) afforded the title compound. 1H NMR (300 MHz, DMSO-d6) δ ppm 10.34 (s, 1 H), 7.83 (d, J=7.12 Hz, 1 H), 7.64 (dd, J=7.97, 1.53 Hz, 1 H), 7.35 (dd, 1 H), 7.08 (dd, 1 H), 3.69-3.85 (m, 2 H), 2.70-2.99 (m, 3 H), 2.53-2.67 (m, 2 H), 2.42 (d, J=6.44 Hz, 2 H), 1.34-1.46 (m, 9 H); MS (APCI+) m/z 400.0 (M+H)+.

Workup

  1. custompurification via flash chromatography (20-100% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-260629b451d9467685a29573265375e0
Source dataset
uspto-grants-2013_08
Patent number
US08518933B2

Linked notes

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