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Hydrochloric Acid → 3-Benzyl-N-(4-methylthiazol-2-yl)pyridin-2-amine hydrochloride

HRID 335098
Notes
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Reaction equation

HRID 335098 reaction equation
Br[C:2]1[C:3]([NH:8][C:9]2[S:10][CH:11]=[C:12]([CH3:14])[N:13]=2)=[N:4][CH:5]=[CH:6][CH:7]=1.C([O-])([O-])=O.[Cs+].[Cs+].[CH2:21](B1C2CCCC1CCC2)[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1.[ClH:37]>Cl[Pd]Cl.O.CN(C=O)C>[ClH:37].[CH2:21]([C:2]1[C:3]([NH:8][C:9]2[S:10][CH:11]=[C:12]([CH3:14])[N:13]=2)=[N:4][CH:5]=[CH:6][CH:7]=1)[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

8

Reactant 4

HCID 313Hydrochloric AcidHCID 10796Cesium carbonateHCID 41509249-Benzyl-9-borabicyclo(3.3.1)nonane2×HCID 613756483-bromo-N-(4-methylthiazol-2-yl)pyridin-2-amine

Product 1

HCID 247645243-Benzyl-N-(4-methylthiazol-2-yl)pyridin-2-amine hydrochlorideYield 50.6%

Reagents, catalysts & solvents 3

HCID 24290Palladium ChlorideCatalyst
HCID 962WaterSolvent2×
HCID 6228DimethylformamideSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of mL 3-bromo-N-(4-methylthiazol-2-yl)pyridin-2-amine (70 mg, 0.26 mmol), Cs2CO3 (250 mg, 0.78 mmol), PdCl2 (dppf) (21.2 mg, 0.026 mmol), and DMF (2 mL) and water (0.5 mL) was purged with nitrogen and 9-benzyl-9-bora-bicyclo[3.3.1]nonane (1.5 mL, 0.78 mmol) was added and heated to 60° C. overnight. Additional 9-benzyl-9-bora-bicyclo[3.3.1]nonane (1.5 mL, 0.78 mmol) was added and heated again overnight. Poured into water and extracted with ether. The organic layer was dried with sodium sulfate, filtered and concentrated. The residue was purified on silica gel (10% EtOAc in hexanes) to afford the title compound (41.7 mg, 50.6% yield) as a white solid after HCl salt formation. 1H NMR (d6-DMSO) δ 8.30 (d, 1H), 7.62 (d, 1H), 7.35-7.10 (m, 6H), 6.82 (s, 1H), 4.21 (s, 2H), 2.32 (s, 3H); Mass spectrum (esi) m/z=282.2 (100)(M+H—HCl).

Workup

  1. additionwas added
  2. temperatureheated again overnight
  3. extractionextracted with ether
  4. dry with materialThe organic layer was dried with sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was purified on silica gel (10% EtOAc in hexanes)

Sources & evidence

ORD record
ord-fc5b9c53bfaf4c6fb555cbf601b51658
Source dataset
uspto-grants-2014_11
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08883828B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes