1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → Tert-butyl 4-(2-(7-bromoquinoxalin-2-yl)hydrazinecarbonyl)piperidine-1-carboxylate

HRID 711379

Reaction equation

HRID 711379 reaction equation
[Br:1][C:2]1[CH:11]=[C:10]2[C:5]([N:6]=[CH:7][C:8]([NH:12][NH2:13])=[N:9]2)=[CH:4][CH:3]=1.[C:14]([O:18][C:19]([N:21]1[CH2:26][CH2:25][CH:24]([C:27](O)=[O:28])[CH2:23][CH2:22]1)=[O:20])([CH3:17])([CH3:16])[CH3:15].CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1>CN(C=O)C.O>[Br:1][C:2]1[CH:11]=[C:10]2[C:5]([N:6]=[CH:7][C:8]([NH:12][NH:13][C:27]([CH:24]3[CH2:25][CH2:26][N:21]([C:19]([O:18][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:20])[CH2:22][CH2:23]3)=[O:28])=[N:9]2)=[CH:4][CH:3]=1

Participants

7

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 3928711-(tert-Butoxycarbonyl)-4-piperidinecarboxylic acidHCID 52002657-Bromo-2-hydrazinylquinoxaline

Product 1

HCID 66803410Tert-butyl 4-(2-(7-bromoquinoxalin-2-yl)hydrazinecarbonyl)piperidine-1-carboxylateYield 62%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A mixture of 7-bromo-2-hydrazinylquinoxaline (3 g, 12.55 mmol), 1-(tert-butoxycarbonyl)piperidine-4-carboxylic acid (3.16 g, 13.81 mmol), EDCI (2.89 g, 15.06 mmol), HOBt (2.03 g, 15.06 mmol), and TEA (1.9 g, 18.83 mmol) in DMF (100 mL) was stirred at r.t. overnight. The mixture was diluted with water (10 mL), and extracted with EtOAc (3×100 mL). The combined layers were dried over Na2SO4, and concentrated in vacuo to afford tert-butyl 4-(2-(7-bromoquinoxalin-2-yl)hydrazinecarbonyl)piperidine-1-carboxylate as pale yellow solid (3.5 g, yield 62%).

Workup

  1. extractionextracted with EtOAc (3×100 mL)
  2. dry with materialThe combined layers were dried over Na2SO4
  3. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-6daeb1f3657544e390363fbe587464e1
Source dataset
uspto-grants-2015_11
Patent number
US09181264B2

Linked notes

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