4-Chloro-3-nitrotoluene → HCID 90405131, compound

HRID 1772494Notes

Reaction equation

HRID 1772494 reaction equation
Cl[C:2]1[CH:7]=[CH:6][C:5]([CH3:8])=[CH:4][C:3]=1[N+:9]([O-:11])=[O:10].[CH2:12]([Sn](CCCC)(CCCC)CCCC)[CH:13]=[CH2:14]>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.ClCCCl>[CH2:14]([C:2]1[CH:7]=[CH:6][C:5]([CH3:8])=[CH:4][C:3]=1[N+:9]([O-:11])=[O:10])[CH:13]=[CH2:12]

Participants

5

Reactant 2

HCID 69764-Chloro-3-nitrotolueneHCID 90628Allyltributylstannane

Product 1

HCID 90405131HCID 90405131, compoundYield 84.9%

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 111,2-DichloroethaneSolvent

Conditions

Temperature
120 °C

Procedure

To 1-chloro-4-methyl-2-nitrobenzene (2.00 g, 11.7 mmol), allyltributylstannane (5.79 g, 17.5 mmol) and bis(triphenylphosphine)palladium(II) dichloride (0.818 g, 1.17 mmol) in two 25-mL reaction vials was added 1,2-dichloroethane (20 mL). The vials were capped and heated at 120° C. for 45 minutes in a Biotage Initiator® microwave reactor with an external IR-sensor temperature monitoring from the side of the vessel. The reaction mixture was loaded onto a Celite® cartridge. The crude material was purified by flash column chromatography using 0-50% ethyl acetate/hexanes as eluent followed by reverse-phase flash column chromatography using 0-100% acetonitrile/water as eluent. The combined acetonitrile/water fractions were concentrated, extracted with ethyl acetate, dried over sodium sulfate, filtered, concentrated, and dried in a vacuum oven to provide the title compound as a yellow liquid (1.76 g, 84%): 1H NMR (400 MHz, CDCl3) δ 7.73 (d, J=0.9 Hz, 1H), 7.34 (dd, J=7.8, 1.2 Hz, 1H), 7.24 (d, J=7.8 Hz, 1H), 5.96 (ddt, J=16.6, 10.1, 6.4 Hz, 1H), 5.08 (ddq, J=18.5, 17.0, 1.5 Hz, 2H), 3.64 (d, J=6.4 Hz, 2H), 2.40 (s, 3H); 13C NMR (101 MHz, CDCl3) δ 149.09, 137.62, 135.35, 133.81, 131.81, 131.72, 124.94, 116.81, 36.62, 20.72; EIMS m/z 176 ([M]+).

Workup

  1. customThe vials were capped
  2. customThe crude material was purified by flash column chromatography
  3. concentrationThe combined acetonitrile/water fractions were concentrated
  4. extractionextracted with ethyl acetate
  5. dry with materialdried over sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customdried in a vacuum oven

Sources & evidence

ORD record
ord-ab03e09bdcab4d50a4ed72247f7b6b63
Source dataset
uspto-grants-2016_02
Patent number
US09249133B2

Reaction notes

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