Cesium carbonate → US9777003, Example 67

HRID 628314Notes

Reaction equation

HRID 628314 reaction equation
[CH2:1]([N:8]1[C:16]2[C:11](=[N:12][C:13](Cl)=[CH:14][CH:15]=2)[CH:10]=[C:9]1[C:18]1[S:19][CH:20]=[CH:21][N:22]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH:23]([C:32](OC(C)(C)C)=O)[NH:24]C(OC(C)(C)C)=O.[C:39]([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>[CH2:1]([N:8]1[C:16]2[CH:15]=[CH:14][C:13]3[N:12]([C:32]([CH3:39])=[N:23][N:24]=3)[C:11]=2[CH:10]=[C:9]1[C:18]1[S:19][CH:20]=[CH:21][N:22]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 3

HCID 10796Cesium carbonateHCID 85431Di-tert-butyl bicarbamateHCID 1181595441-benzyl-5-chloro-2-(1,3-thiazol-2-yl)-1H-pyrrolo[3,2-b]pyridine

Product 1

HCID 118159778US9777003, Example 67

Reagents, catalysts & solvents 2

HCID 178439015HCID 178439015, compoundCatalystHCID 1140TolueneSolvent

Conditions

Temperature
110 °C

Procedure

1-Benzyl-5-chloro-2-(1,3-thiazol-2-yl)-1H-pyrrolo[3,2-b]pyridine (30 mg, 0.092 mmol, from Step 1), di-tert-butyl hydrazine-1,2-dicarboxylate (26 mg, 0.11 mmol) and Cs2CO3 (30 mg, 0.092 mmol) were combined in toluene (2.8 mL) and dicyclohexyl(2′,4′,6′-triisopropylbiphenyl-2-yl)phosphine-(2′-aminobiphenyl-2-yl)(chloro)palladium (1:1) (7.2 mg, 0.0092 mmol) was added. The mixture was degassed by a stream of nitrogen through the solution for 10 minutes. The reaction was heated to 110° C. overnight. The intermediate di-tert-butyl 1-[1-benzyl-2-(1,3-thiazol-2-yl)-1H-pyrrolo[3,2-b]pyridin-5-yl]hydrazine-1,2-dicarboxylate was purified via preparative HPLC-MS (C18 eluting with a gradient of MeCN and H2O containing 0.15% NH4OH) and was isolated in the amount of 20 mg after evaporation of eluent. The resulting residue was dissolved in acetic acid (1.9 mL) and heated in the microwave to a temperature of 165° C. for 5 minutes. AcOH was removed in vacuo and the residue was reconstituted and purified via preparative HPLC-MS (C18 eluting with a gradient of MeCN and H2O containing 0.15% NH4OH). Yield: (4.6 mg, 14%).

Workup

  1. customThe mixture was degassed by a stream of nitrogen through the solution for 10 minutes
  2. customThe intermediate di-tert-butyl 1-[1-benzyl-2-(1,3-thiazol-2-yl)-1H-pyrrolo[3,2-b]pyridin-5-yl]hydrazine-1,2-dicarboxylate was purified via preparative HPLC-MS (C18
  3. washeluting with a gradient of MeCN and H2O containing 0.15% NH4OH) and
  4. customwas isolated in the amount of 20 mg
  5. customafter evaporation of eluent
  6. dissolutionThe resulting residue was dissolved in acetic acid (1.9 mL)
  7. temperatureheated in the microwave to a temperature of 165° C. for 5 minutes
  8. customAcOH was removed in vacuo
  9. custompurified via preparative HPLC-MS (C18
  10. washeluting with a gradient of MeCN and H2O containing 0.15% NH4OH)

Sources & evidence

ORD record
ord-7d055e9fc30e495bb981438ba8a5e1a9
Source dataset
uspto-grants-2016_04
Patent number
US09309246B2

Reaction notes

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