Bromocyclopentane → 3-Cyclopentyloxy-4-methoxybenzaldehyde

HRID 1616760Notes

Reaction equation

HRID 1616760 reaction equation
Br[CH:2]1[CH2:6][CH2:5][CH2:4][CH2:3]1.[O:7]=[CH:8][C:9]1[CH:17]=[CH:16][C:13]([O:14][CH3:15])=[C:11]([OH:12])[CH:10]=1.C(=O)([O-])[O-].[K+].[K+]>CCO>[CH:2]1([O:12][C:11]2[CH:10]=[C:9]([CH:17]=[CH:16][C:13]=2[O:14][CH3:15])[CH:8]=[O:7])[CH2:6][CH2:5][CH2:4][CH2:3]1

Participants

5

Reactant 3

HCID 8728BromocyclopentaneHCID 11430Potassium CarbonateHCID 12127Isovanillin

Product 1

HCID 27358933-Cyclopentyloxy-4-methoxybenzaldehydeYield 97%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

Bromocyclopentane (1.4 mL, 13 mmol) was added to a suspension of isovanillin (1.0 g, 6.6 mmol) and potassium carbonate (2.7 g, 10 mmol) in EtOH (15 mL) and treated according to Procedure 3. 3-Cyclopentyloxy-4-methoxybenzaldehyde (1.4 g, 97%) was obtained as a yellow oil; δH (400 MHz, CDCl3) 1.63 (m, 2H, CH2), 1.79-1.93 (m, 4H, CH2), 1.99 (m, 2H, CH2), 3.93 (s, 3H, OCH3), 4.85 (tt, J=6.4, 3.2 Hz, 1H, OCH), 6.96 (d, J5,6=8.0 Hz, 1H, H5), 7.39 (d, J2,6=2.0 Hz, 1H, H2), 7.42 (dd, J5,6=8.0, J2,6=2.0 Hz, 1H, H6), 9.84 (s, 1H, CHO); δC (100 MHz, CDCl3) 24.1, 32.7, 56.1, 80.5, 110.7, 112.1, 126.3, 130.0, 148.2, 155.4, 191.0; vmax 1001, 1132, 1261, 1431, 1508, 1584, 1683, 2956 cm−1.

Workup

  1. additiontreated

Sources & evidence

ORD record
ord-d107bc3e20b547c8b161fc0e4ec28e3a
Source dataset
uspto-grants-2014_07
Patent number
US08765812B2

Reaction notes

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