Phenol → HCID 18778844, compound

HRID 2396030Notes

Reaction equation

HRID 2396030 reaction equation
[CH:1]1([O:6][C:7]2[CH:12]=[C:11]([C:13]3[CH:18]=[CH:17][CH:16]=[C:15]([N+:19]([O-:21])=[O:20])[CH:14]=3)[CH:10]=[CH:9][C:8]=2[OH:22])[CH2:5][CH2:4][CH2:3][CH2:2]1.[C:23]([O-])([O-])=O.[Cs+].[Cs+].C1(Br)CCCC1.C1(O)C=CC=CC=1>CN(C=O)C.C(Cl)Cl>[CH:1]1([O:6][C:7]2[CH:12]=[C:11]([C:13]3[CH:18]=[CH:17][CH:16]=[C:15]([N+:19]([O-:21])=[O:20])[CH:14]=3)[CH:10]=[CH:9][C:8]=2[O:22][CH3:23])[CH2:2][CH2:3][CH2:4][CH2:5]1

Participants

7

Reactant 4

HCID 996Phenol2×HCID 8728Bromocyclopentane2×HCID 10796Cesium carbonate2×HCID 18778849HCID 18778849, compound

Product 1

HCID 18778844HCID 18778844, compoundYield 53.9%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

2-Cyclopentyloxy-4-(3-nitrophenyl)phenol (600 mg, 2.45 mmol) was dissolved in DMF (40 ml) and treated with Cs2CO3 (730 mg, 2.24 mmol) and cyclopentyl bromide (0.32 ml, 2.94 mmol). After stirring overnight at RT some of the phenol remained (SiO2 :t.l.c, CH2Cl2). Cs2CO3 (870 mg, 2.67 mmol) and cyclopentyl bromide (0.32 ml, 2.94 mmol) were added. After stirring at RT for 3 h the phenol had been consumed. The reaction mixture was filtered and concentrated in vacuo. The residue was dissolved in Et2O (50 ml), filtered, and concentrated in vacuo to give a yellow solid which was recrystallised fromdichloromethane/hexane to afford the title compound (378 mg) as yellow needles. δH (CDCl3 ; 80 mHz) 1.5-2.1 (8H, br m, (CH2)4), 3.87 (3H, s, OMe), 4.84 (1H, br m, OCHCH2), 6.91 (1 H, d, J9.1 Hz, ArH ortho to OMe), 7.0-7.2 (2H, m, ArH meta to OMe), 7.54 (1H, d, J7.5 Hz, ArH meta to NO2), 7.80 (1 H, ca. dt, Jca 7.5, 1.5 Hz, ArH para to NO2), 8.09 (1 H, ca. dt, J ca.8, 1.5 Hz, ArH parato aryl), 8.33 (1 H, ca. t, J ca 2 Hz, ArH ortho to NO2 and aryl); m/z313 (M+, 7%), 246 (17), 245 (M+ -cyclopentyl, 100), 230 (41), 202(8), and 139 (9).

Workup

  1. customhad been consumed
  2. filtrationThe reaction mixture was filtered
  3. concentrationconcentrated in vacuo
  4. dissolutionThe residue was dissolved in Et2O (50 ml)
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customto give a yellow solid which
  8. customwas recrystallised fromdichloromethane/hexane

Sources & evidence

ORD record
ord-283d1ef3a67a4961bc897d6e14070697
Source dataset
uspto-grants-1996_02
Patent number
US05491147

Reaction notes

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