Diisopropylethylamine → racemic trans [3-(1-benzenesulfonyl-5-nitro-1H-pyrrolo[2,3-b]pyridin-4-ylamino)-cyclopentyl]-carbamic acid tert-butyl ester

HRID 1257683Notes

Reaction equation

HRID 1257683 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]([O:27][C:28](=[O:36])[NH:29][C@H:30]1[CH2:34][CH2:33][C@H:32]([NH2:35])[CH2:31]1)([CH3:26])([CH3:25])[CH3:24].C(N(C(C)C)CC)(C)C>CC(O)C>[C:23]([O:27][C:28](=[O:36])[NH:29][C@H:30]1[CH2:34][CH2:33][C@H:32]([NH:35][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)[CH2:31]1)([CH3:26])([CH3:24])[CH3:25]

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 45091937tert-Butyl N-((1S,3S)-3-aminocyclopentyl)carbamateHCID 583947741-(benzenesulfonyl)-4-chloro-5-nitro-1H-pyrrolo(2,3-b)pyridine

Product 1

HCID 131730635racemic trans [3-(1-benzenesulfonyl-5-nitro-1H-pyrrolo[2,3-b]pyridin-4-ylamino)-cyclopentyl]-carbamic acid tert-butyl esterYield 94.7%

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Procedure

A mixture of 1-benzenesulfonyl-4-chloro-5-nitro-1H-pyrrolo[2,3-b]pyridine (16.9 g, 49.9 mmol), racemic trans (3-amino-cyclopentyl)-carbamic acid tert-butyl ester (10.0 g, 49.9 mmol: Prepared according to J. Org. Chem. 2004, 69(13), 4538; Tetrahedron 1997, 53(9), 3347; WO94/17090 and Org. Lett. 2000, 2, 4169) and diisopropylethylamine (12.0 mL, 69.9 mmol) in propan-2-ol (175 mL) was heated at reflux for 4 hours. After cooling, the mixture was concentrated in vacuo and the residue triturated (water) to give 23.7 g (94%) of racemic trans [3-(1-benzenesulfonyl-5-nitro-1H-pyrrolo[2,3-b]pyridin-4-ylamino)-cyclopentyl]-carbamic acid tert-butyl ester as a yellow solid. LCMS (Method B, ESI): RT=4.25 min, m+H=502.3; 1H NMR (400 MHz, DMSO) δ: 8.89 (s, 1H), 8.87 (d, 1H), 8.12 (d, 2H), 7.83 (d, 1H), 7.76 (m, 1H), 7.65 (t, 2H), 7.17 (d, 1H), 7.06 (br d, 1H), 4.62 (m, 1H), 3.99 (m, 1H), 2.24 (m, 1H), 1.97 (m, 3H), 1.56 (m, 2H), 1.38 (s, 9H).

Workup

  1. temperaturewas heated
  2. temperatureat reflux for 4 hours
  3. temperatureAfter cooling
  4. concentrationthe mixture was concentrated in vacuo
  5. customthe residue triturated (water)

Sources & evidence

ORD record
ord-4fd2b45c4f824c079ca7ad1b6233ea3e
Source dataset
uspto-grants-2013_06
Patent number
US08461328B2

Reaction notes

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