Cesium carbonate → HCID 66555938, compound

HRID 1629934Notes

Reaction equation

HRID 1629934 reaction equation
CC1(C)C(C)(C)OB([C:9]2[CH:10]=[C:11]3[CH:17]=[CH:16][NH:15][C:12]3=[N:13][CH:14]=2)O1.Cl[C:20]1[C:25]([N:26]2[CH2:30][CH2:29][CH2:28][CH2:27]2)=[N:24][CH:23]=[CH:22][N:21]=1.C([O-])([O-])=O.[Cs+].[Cs+]>COCCOC.C(Cl)(Cl)Cl>[N:26]1([C:25]2[C:20]([C:9]3[CH:10]=[C:11]4[CH:17]=[CH:16][NH:15][C:12]4=[N:13][CH:14]=3)=[N:21][CH:22]=[CH:23][N:24]=2)[CH2:30][CH2:29][CH2:28][CH2:27]1

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 242087895-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrolo(2,3-b)pyridineHCID 51072290HCID 51072290, compound

Product 1

HCID 66555938HCID 66555938, compound

Reagents, catalysts & solvents 2

HCID 6212ChloroformSolventHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
100 °C

Procedure

The starting material 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrolo[2,3-b]pyridine (124) (50 mg, 0.2048 mmol, 1 eq) and 2-chloro-3-(pyrrolidin-1-yl)pyrazine (72) (33 mg, 0.184 mmol, 1 eq) in DME (8 mL) was degassed and purged under argon atmosphere for 10 min. To this reaction mixture was charged Cs2CO3 (133 mg, 0.409 mmol, 2 eq) followed by addition of Pd(dpp)Cl2 (6 mg, 0.00819 mmol, 0.04 eq) and degassing and purging under argon for additional min. The reaction mixture was heated at 100° C. for 12 h in a sealed tube. After completion of the reaction, the reaction mixture was diluted with CHCl3 and filtered through Celite. The solvents were distilled off and the crude material was submitted for flash column purification in neutral alumina using 1% MeOH/CHCl3 to obtain pale yellow solid compound 5-(3-(pyrrolidin-1-yl)pyrazin-2-yl)-1H-pyrrolo[2,3-b]pyridine 128 in 10 mg quantity. The compound 128 was confirmed by 1HNMR and LCMS. 1H NMR (400 MHz, CDCl3) δ: 9.50 (s, 1H), 8.58 (d, J=1.95, 1H), 8.15 (d, J=1.58, 1H), 8.04 (m, J=2.56, 2H), 7.38 (m, J=3.45, 1H), 6.56 (m, J=1.58, 1H), 3.18 (m, J=6.70, 1H), 1.81 (m, J=2.92, 4H; MS m/z 265.9 (M+H)+.

Workup

  1. custompurged under argon atmosphere for 10 min
  2. customdegassing
  3. custompurging under argon for additional min
  4. customAfter completion of the reaction
  5. filtrationfiltered through Celite
  6. distillationThe solvents were distilled off
  7. customthe crude material was submitted for flash column purification in neutral alumina using 1% MeOH/CHCl3

Sources & evidence

ORD record
ord-c019c51339584c5284b4851f935a6f89
Source dataset
uspto-grants-2014_07
Patent number
US08791112B2

Reaction notes

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