3,4,5-Trimethoxybenzaldehyde → HCID 85075233, compound

HRID 1884882Notes

Reaction equation

HRID 1884882 reaction equation
[OH-].[K+].[CH3:3][C:4]1[C:13]2[C:8](=[C:9]([C:20](=[O:22])[CH3:21])[C:10]([O:14][CH2:15][CH:16]=[C:17]([CH3:19])[CH3:18])=[CH:11][CH:12]=2)[O:7][C:6](=[O:23])[CH:5]=1.[CH3:24][O:25][C:26]1[CH:27]=[C:28]([CH:31]=[C:32]([O:36][CH3:37])[C:33]=1[O:34][CH3:35])[CH:29]=O>C(O)C.O>[CH3:3][C:4]1[C:13]2[C:8](=[C:9]([C:20](=[O:22])[CH:21]=[CH:29][C:28]3[CH:31]=[C:32]([O:36][CH3:37])[C:33]([O:34][CH3:35])=[C:26]([O:25][CH3:24])[CH:27]=3)[C:10]([O:14][CH2:15][CH:16]=[C:17]([CH3:18])[CH3:19])=[CH:11][CH:12]=2)[O:7][C:6](=[O:23])[CH:5]=1

Participants

6

Reactant 3

HCID 68583,4,5-TrimethoxybenzaldehydeHCID 14797Potassium HydroxideHCID 23504933HCID 23504933, compound

Product 1

HCID 85075233HCID 85075233, compoundYield 37.3%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 962WaterSolvent

Procedure

A solution of KOH 50% (3 ml) is added to an equimolar solution of 4-methyl-7-(3-methylbut-2-enyloxy)-8-acetylcoumarin (2.14 g, 0.0075 mol) and 3,4,5-trimethoxy-benzaldehyde (1.47 g, 0.0075 mol) in ethanol 95%; the addition is performed under energetic stirring at room temperature. The reaction is left under stirring for one night and then diluted with water and acidified. The precipitate is separated by filtration and dried under vacuum. The compound is crystallized by methanol to give 1.3 g of product m.p. 148-150° C., 1H-NMR (CDCl3) δ: 1.69 (s, 3H,); 1.72 (s, 3H); 2.44 (d, 3H, J=1.2 Hz); 3.74-3.88 (m, 9H); 4.65 (d, 2H, J=6.5 Hz); 5.34-5.38 (m, 1H); 6.16 (s, 1H); 6.93 (d, 1H, J=16 Hz); 6.95 (d, 1H, J=8.9 Hz); 7.25 (d, 1H, J=16 Hz); 7.63 (d, 1H, J=8.9 Hz).

Workup

  1. additionthe addition
  2. waitThe reaction is left
  3. stirringunder stirring for one night
  4. customThe precipitate is separated by filtration
  5. customdried under vacuum
  6. customThe compound is crystallized by methanol

Sources & evidence

ORD record
ord-4d4f2b6f00b84b2c8e097d30d24f8108
Source dataset
uspto-grants-2004_07
Patent number
US06767916B2

Reaction notes

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