Benzyl Chloride → HCID 10757874, compound

HRID 2294526Notes

Reaction equation

HRID 2294526 reaction equation
[Cl:1][C:2]1[C:11]([OH:12])=[C:10]([N+:13]([O-:15])=[O:14])[CH:9]=[C:8]2[C:3]=1[CH2:4][CH2:5][CH2:6][CH2:7]2.[CH2:16](Cl)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.C([O-])([O-])=O.[K+].[K+]>CN(C=O)C>[CH2:16]([O:12][C:11]1[C:2]([Cl:1])=[C:3]2[C:8](=[CH:9][C:10]=1[N+:13]([O-:15])=[O:14])[CH2:7][CH2:6][CH2:5][CH2:4]2)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

Participants

5

Reactant 3

HCID 7503Benzyl ChlorideHCID 11430Potassium CarbonateHCID 10585420HCID 10585420, compound

Product 1

HCID 10757874HCID 10757874, compoundYield 69.2%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

5-Chloro-6-hydroxy-7-nitrotetralin (2.28 g, 10.0 mmol) was dissolved in dry DMF (40 mL) and flushed with argon. Benzyl chloride (11.5 mL, 100.0 mmol) n-Bu4NI (95 mg, 0.25 mmol) and K2CO3 (41.5 g, 30.0 mmol) were added. The reaction mixture was stirred for 24 h at room temperature, protected from light. The salts were filtered off and the solvent and excess of BnCl were co-evaporated with xylene (3×200 mL) and CH2Cl2 (200 mL), followed by vacuum-drying. The crude product (5.8 g) was purified by flash column chromatography (SiO2, CHCl3 -Hexane 1:1) and afforded the title compound (2.20 g). Mp 80°-82° C.; 1H NMR (DMSO-d6): δ 7.73 (s, 1H), 7.48-7.37 (m, 5H), 5.06 (s, 2H), 2.79-2.75 (m, 4H), 1.79-1.69 (dm, 4H); 13C NMR (DMSO-d6): δ 144.81, 142.14, 135.79, 135.56, 129.55, 128.42, 123.40, 106.20, 105.51, 75.80, 28.63, 27.65, 21.55, 21.36; MS (TSP): m/z (rel.int.) 337/335 (M+NH4, 30/100).

Workup

  1. customflushed with argon
  2. filtrationThe salts were filtered off
  3. customby vacuum-drying
  4. customThe crude product (5.8 g) was purified by flash column chromatography (SiO2, CHCl3 -Hexane 1:1)

Sources & evidence

ORD record
ord-7299e0948a38443a9205b3e3a5b530ec
Source dataset
uspto-grants-1997_11
Patent number
US05688945

Reaction notes

Loading…