Diisopropylethylamine → 4-(1-benzenesulfonyl-5-nitro-1H-pyrrolo[2,3-b]pyridine-4-ylamino)-piperidine-1-carboxylic acid tert-butyl ester

HRID 1257616Notes

Reaction equation

HRID 1257616 reaction equation
[C:1]1([S:7]([N:10]2[C:14]3=[N:15][CH:16]=[C:17]([N+:20]([O-:22])=[O:21])[C:18](Cl)=[C:13]3[CH:12]=[CH:11]2)(=[O:9])=[O:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[C:23]([N:30]1[CH2:35][CH2:34][CH:33]([NH2:36])[CH2:32][CH2:31]1)([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24].C(N(C(C)C)CC)(C)C>CC(O)C>[C:26]([O:25][C:23]([N:30]1[CH2:35][CH2:34][CH:33]([NH:36][C:18]2[C:17]([N+:20]([O-:22])=[O:21])=[CH:16][N:15]=[C:14]3[N:10]([S:7]([C:1]4[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=4)(=[O:9])=[O:8])[CH:11]=[CH:12][C:13]=23)[CH2:32][CH2:31]1)=[O:24])([CH3:29])([CH3:27])[CH3:28]

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 12682914-Amino-1-Boc-piperidineHCID 583947741-(benzenesulfonyl)-4-chloro-5-nitro-1H-pyrrolo(2,3-b)pyridine

Product 1

HCID 673440274-(1-benzenesulfonyl-5-nitro-1H-pyrrolo[2,3-b]pyridine-4-ylamino)-piperidine-1-carboxylic acid tert-butyl esterYield 95%

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Procedure

A stirred mixture of 1-benzenesulfonyl-4-chloro-5-nitro-1H-pyrrolo[2,3-b]pyridine (23.8 g, 70.5 mmol), 1-BOC-4-aminopiperidine (15.5 g, 77.5 mmol) and diisopropylethylamine (17.0 mL, 98.7 mmol) in propan-2-ol (250 mL) was heated to reflux for approximately 2 hours. After cooling, the resulting suspension was filtered and the solid washed with propan-2-ol and diethyl ether, then air dried to afford 33.6 g (95%) of 4-(1-benzenesulfonyl-5-nitro-1H-pyrrolo[2,3-b]pyridine-4-ylamino)-piperidine-1-carboxylic acid tert-butyl ester as a yellow solid. 1H NMR (400 MHz, CDCl3) δ: 9.12 (br d, 1H), 9.09 (s, 1H), 8.21 (m, 2H), 7.66 (m, 2H), 7.53 (t, 2H), 6.69 (d, 1H), 4.14 (m, 1H), 4.01 (d, 2H), 3.12 (t, 2H), 2.11-2.08 (m, 2H), 1.65-1.64 (m, 2H), 1.48 (s, 9H).

Workup

  1. temperaturewas heated
  2. temperatureto reflux for approximately 2 hours
  3. temperatureAfter cooling
  4. filtrationthe resulting suspension was filtered
  5. washthe solid washed with propan-2-ol and diethyl ether
  6. customair dried

Sources & evidence

ORD record
ord-76939c1ecc82418dad600ce6c55a1ebb
Source dataset
uspto-grants-2013_06
Patent number
US08461328B2

Reaction notes

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