Cesium carbonate → di-tert-butyl 1-(1-(3-fluorobenzyl)-2-{[(3-fluorobenzyl)oxy]carbonyl}-1H-pyrrolo[3,2-b]pyridin-5-yl)hydrazine-1,2-dicarboxylate

HRID 628360Notes

Reaction equation

HRID 628360 reaction equation
Cl[C:2]1[N:7]=[C:6]2[CH:8]=[C:9]([C:19]([O:21][CH2:22][C:23]3[CH:28]=[CH:27][CH:26]=[C:25]([F:29])[CH:24]=3)=[O:20])[N:10]([CH2:11][C:12]3[CH:17]=[CH:16][CH:15]=[C:14]([F:18])[CH:13]=3)[C:5]2=[CH:4][CH:3]=1.[NH:30]([C:39]([O:41][C:42]([CH3:45])([CH3:44])[CH3:43])=[O:40])[NH:31][C:32]([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33].C([O-])([O-])=O.[Cs+].[Cs+]>C1(C)C=CC=CC=1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C(C(C)C)=CC(C(C)C)=CC=2C(C)C)CCCCC1.NC1C=CC=CC=1C1C=CC=CC=1[Pd]Cl>[F:18][C:14]1[CH:13]=[C:12]([CH:17]=[CH:16][CH:15]=1)[CH2:11][N:10]1[C:5]2[C:6](=[N:7][C:2]([N:30]([C:39]([O:41][C:42]([CH3:45])([CH3:44])[CH3:43])=[O:40])[NH:31][C:32]([O:34][C:35]([CH3:36])([CH3:37])[CH3:38])=[O:33])=[CH:3][CH:4]=2)[CH:8]=[C:9]1[C:19]([O:21][CH2:22][C:23]1[CH:28]=[CH:27][CH:26]=[C:25]([F:29])[CH:24]=1)=[O:20]

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 85431Di-tert-butyl bicarbamateHCID 1181596253-fluorobenzyl 5-chloro-1-(3-fluorobenzyl)-1H-pyrrolo[3,2-b]pyridine-2-carboxylate

Product 1

HCID 118159869di-tert-butyl 1-(1-(3-fluorobenzyl)-2-{[(3-fluorobenzyl)oxy]carbonyl}-1H-pyrrolo[3,2-b]pyridin-5-yl)hydrazine-1,2-dicarboxylate

Reagents, catalysts & solvents 2

HCID 178439015HCID 178439015, compoundCatalystHCID 1140TolueneSolvent

Conditions

Temperature
110 °C

Procedure

3-Fluorobenzyl 5-chloro-1-(3-fluorobenzyl)-1H-pyrrolo[3,2-b]pyridine-2-carboxylate (0.40 g, 0.97 mmol, from Step 1), di-tert-butyl hydrazine-1,2-dicarboxylate (0.25 g, 1.1 mmol, Aldrich), dicyclohexyl(2′,4′,6′-triisopropylbiphenyl-2-yl)phosphine-(2′-aminobiphenyl-2-yl)(chloro)palladium (1:1) (0.076 g, 0.097 mmol, Aldrich), and Cs2CO3 (0.32 g, 0.97 mmol, Aldrich) were combined in toluene (8.6 mL) and the mixture was degassed by a stream of nitrogen through the solution for 10 minutes. The reaction was stirred at 110° C. for 6 hours. The reaction mixture was partitioned between water and ethyl acetate, the aqueous was extracted three times, and the combined extracts were dried over sodium sulfate, filtered and concentrated. Flash chromatography, eluting with a gradient from 0-40% EtOAc in hexanes, was used to purify the product. Yield: (0.33 g, 56%).

Workup

  1. customthe mixture was degassed by a stream of nitrogen through the solution for 10 minutes
  2. customThe reaction mixture was partitioned between water and ethyl acetate
  3. extractionthe aqueous was extracted three times
  4. dry with materialthe combined extracts were dried over sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated
  7. washFlash chromatography, eluting with a gradient from 0-40% EtOAc in hexanes
  8. customto purify the product

Sources & evidence

ORD record
ord-bd160bb1e97143e9aa63c101aa211761
Source dataset
uspto-grants-2016_04
Patent number
US09309246B2

Reaction notes

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