1-(7-Bromo-5-pyridin-3-yl-benzothiazol-2-yl)-3-ethyl-urea → 1-(7-Allyl-5-pyridin-3-yl-benzothiazol-2-yl)-3-ethyl-urea

HRID 1010668Notes

Reaction equation

HRID 1010668 reaction equation
Br[C:2]1[C:10]2[S:9][C:8]([NH:11][C:12]([NH:14][CH2:15][CH3:16])=[O:13])=[N:7][C:6]=2[CH:5]=[C:4]([C:17]2[CH:18]=[N:19][CH:20]=[CH:21][CH:22]=2)[CH:3]=1.[CH2:23]([CH:27]([Sn])C=C(CCCC)CCCC)[CH2:24]CC>CN(C=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH2:27]([C:2]1[C:10]2[S:9][C:8]([NH:11][C:12]([NH:14][CH2:15][CH3:16])=[O:13])=[N:7][C:6]=2[CH:5]=[C:4]([C:17]2[CH:18]=[N:19][CH:20]=[CH:21][CH:22]=2)[CH:3]=1)[CH:23]=[CH2:24]

Participants

5

Reactant 2

HCID 248642171-(7-Bromo-5-pyridin-3-yl-benzothiazol-2-yl)-3-ethyl-ureaHCID 86589045Tributylallyltin

Product 1

HCID 578136231-(7-Allyl-5-pyridin-3-yl-benzothiazol-2-yl)-3-ethyl-urea

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
120 °C

Procedure

To a solution of 1-(7-bromo-5-pyridin-3-yl-benzothiazol-2-yl)-3-ethyl-urea (0.14 g, 0.37 mmol) in DMF (2 mL) was added tributylallyltin (0.15 g, 0.45 mmol) under nitrogen atmosphere at room temperature. The reaction mixture was then degassed for half an hour followed by the addition of tetrakis(triphenylphosphine)palladium(0) (0.043 g, 0.0371 mmol). The reaction mixture was then again degassed for half an hour and heated at 120° C. for 20 h under nitrogen atmosphere. After the completion of the reaction (TLC monitoring), DMF was distilled off; water was added to the reaction mixture and extracted with ethyl acetate (×3). The combined organic layer was dried over anhydrous Na2SO4, and evaporated to dryness under reduced pressure. The crude residue was purified over silica gel (230-400 M) using EtOAc-MeOH (95:5) to provide the title compound as off white solid (0.034 g, 27%).

Workup

  1. customThe reaction mixture was then degassed for half an hour
  2. customThe reaction mixture was then again degassed for half an hour
  3. customAfter the completion of the reaction (TLC monitoring), DMF
  4. distillationwas distilled off
  5. additionwater was added to the reaction mixture
  6. extractionextracted with ethyl acetate (×3)
  7. dry with materialThe combined organic layer was dried over anhydrous Na2SO4
  8. customevaporated to dryness under reduced pressure
  9. customThe crude residue was purified over silica gel (230-400 M)

Sources & evidence

ORD record
ord-45436e08fc68496abd8a942bd8187616
Source dataset
uspto-grants-2011_07
Patent number
US07977340B2

Reaction notes

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