Diisopropylethylamine → (R)-tert-butyl 3-((5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)methylcarbamoyl)piperidine-1-carboxylate

HRID 1969736Notes

Reaction equation

HRID 1969736 reaction equation
Cl.[S:2]([N:12]1[C:16]2=[N:17][CH:18]=[C:19]([CH2:21][NH2:22])[N:20]=[C:15]2[CH:14]=[CH:13]1)([C:5]1[CH:11]=[CH:10][C:8]([CH3:9])=[CH:7][CH:6]=1)(=[O:4])=[O:3].CCN(C(C)C)C(C)C.[C:32]([N:39]1[CH2:44][CH2:43][CH2:42][C@@H:41]([C:45](O)=[O:46])[CH2:40]1)([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>C(Cl)Cl.O>[S:2]([N:12]1[C:16]2=[N:17][CH:18]=[C:19]([CH2:21][NH:22][C:45]([C@@H:41]3[CH2:42][CH2:43][CH2:44][N:39]([C:32]([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33])[CH2:40]3)=[O:46])[N:20]=[C:15]2[CH:14]=[CH:13]1)([C:5]1[CH:6]=[CH:7][C:8]([CH3:9])=[CH:10][CH:11]=1)(=[O:3])=[O:4]

Participants

7

Reactant 4

HCID 81531DiisopropylethylamineHCID 6435161-(1,1-Dimethylethyl) (3R)-1,3-piperidinedicarboxylateHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 67068339(5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)methanamine hydrochloride

Product 1

HCID 58557667(R)-tert-butyl 3-((5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)methylcarbamoyl)piperidine-1-carboxylateYield 100.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of (5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)methanamine hydrochloride (5 g, 14.7 mmol) in DCM (78 mL) was added DIEA (7.7 mL, 44.3 mmol) and stirred at ambient temperature for about 10 min followed by the addition of (R)-N-Boc-piperidine-3-carboxylic acid (3.38 g, 14.7 mmol, CNH-Technologies) and HATU (5.61 g, 14.7 mmol). The mixture was stirred for about 1 h at ambient temperature and to it was added water (30 mL) and the layers were separated. The organic layer was washed with saturated aqueous NaHCO3 (30 mL) and brine (30 mL), dried over anhydrous MgSO4, filtered, and concd under reduced pressure. The crude material was purified by silica gel chromatography eluting with a gradient of 0-5% MeOH in DCM to afford crude (R)-tert-butyl 3-((5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)methylcarbamoyl)piperidine-1-carboxylate (7.58 g, 94%): LC/MS (Table 1, Method b) Rt=2.30 min; MS m/z: 514 (M+H)+.

Workup

  1. stirringThe mixture was stirred for about 1 h at ambient temperature and to it
  2. customthe layers were separated
  3. washThe organic layer was washed with saturated aqueous NaHCO3 (30 mL) and brine (30 mL)
  4. dry with materialdried over anhydrous MgSO4
  5. filtrationfiltered
  6. customThe crude material was purified by silica gel chromatography
  7. washeluting with a gradient of 0-5% MeOH in DCM

Sources & evidence

ORD record
ord-910db809217f4e2ab1be71012c4890a7
Source dataset
uspto-grants-2013_04
Patent number
US08426411B2

Reaction notes

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