Tributylphenyltin → HCID 66693139, compound

HRID 2367990Notes

Reaction equation

HRID 2367990 reaction equation
Br[C:2]1[C:10]2[CH:9]([CH2:11][N+:12]([O-:14])=[O:13])[O:8][B:7]([OH:15])[C:6]=2[C:5]([O:16][CH2:17][CH3:18])=[CH:4][CH:3]=1.C([Sn](CCCC)(CCCC)[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)CCC>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>[CH2:17]([O:16][C:5]1[C:6]2[B:7]([OH:15])[O:8][CH:9]([CH2:11][N+:12]([O-:14])=[O:13])[C:10]=2[C:2]([C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)=[CH:3][CH:4]=1)[CH3:18]

Participants

5

Reactant 2

HCID 607632TributylphenyltinHCID 67494398HCID 67494398, compound

Product 1

HCID 66693139HCID 66693139, compoundYield 20%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of 4-bromo-7-ethoxy-3-(nitromethyl)benzo[c][1,2]oxaborol-1(3H)-ol (315 mg, 1 mmol), tributyl-phenyl-stannane (750 mg, 2 mmol) and Pd(Ph3P)4 (Cat.) in DMF (15 mL) was degassed for 15 min with N2 and then stirred at 100° C. for 30 min in microwave reactor (Biotage). After the reaction was quenched with ice-water, the resulting mixture was extracted with EtOAc (3×40 mL). The combined organic layers were washed with water (20 mL) and brine (20 mL), dried over anhydrous Na2SO4 and then concentrated to dryness. The residue was purified by column chromatography on silica gel to give the compound as white solid (60 mg, yield 20%). 1HNMR (400 MHz, DMSO-d6) δ 9.13 (s, 1H), 7.46-7.49 (m, 5H), 7.34-7.48 (m, 2H), 6.17-6.20 (m, 1H), 4.88-4.92 (m, 1H), 4.21-4.25 (m, 1H), 4.05-4.16 (m, 2H), 1.34-1.37 (m, 3H).

Workup

  1. customwas degassed for 15 min with N2
  2. customAfter the reaction was quenched with ice-water
  3. extractionthe resulting mixture was extracted with EtOAc (3×40 mL)
  4. washThe combined organic layers were washed with water (20 mL) and brine (20 mL)
  5. dry with materialdried over anhydrous Na2SO4
  6. concentrationconcentrated to dryness
  7. customThe residue was purified by column chromatography on silica gel

Sources & evidence

ORD record
ord-2791742173ae4ad89d0770f795f4f1ba
Source dataset
uspto-grants-2014_04
Patent number
US08703742B2

Reaction notes

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