Potassium Hydroxide → HCID 60099038, compound

HRID 1884891Notes

Reaction equation

HRID 1884891 reaction equation
[OH-].[K+].[CH3:3][C:4]1[C:13]2[C:8](=[C:9]([C:18](=[O:20])[CH3:19])[C:10]([O:14][CH2:15][C:16]#[CH:17])=[CH:11][CH:12]=2)[O:7][C:6](=[O:21])[CH:5]=1.[F:22][C:23]1[CH:30]=[CH:29][C:26]([CH:27]=O)=[CH:25][CH:24]=1>C(O)C.O>[CH3:3][C:4]1[C:13]2[C:8](=[C:9]([C:18](=[O:20])[CH:19]=[CH:27][C:26]3[CH:29]=[CH:30][C:23]([F:22])=[CH:24][CH:25]=3)[C:10]([O:14][CH2:15][C:16]#[CH:17])=[CH:11][CH:12]=2)[O:7][C:6](=[O:21])[CH:5]=1

Participants

6

Reactant 3

HCID 14797Potassium HydroxideHCID 680234-FluorobenzaldehydeHCID 23504931HCID 23504931, compound

Product 1

HCID 60099038HCID 60099038, compoundYield 44.2%

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-prop2-ynyloxy-8-acetylcoumarin (1.92 g, 0.0075 mol) and 4-fluorobenzaldehyde (0.93 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 ethanol to give 1.2 g of product m.p. 185-186° C., 1H-NMR (CDCl3) δ: 2.43 (d, J=1.2 Hz, 3H), 2.52 (m, 1H), 4.79 (d, J=1.2 Hz, 2H), 6.17 (d, J=1.2 Hz, 1H), 6.96-7.66 (m, 8H).

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 ethanol

Sources & evidence

ORD record
ord-e4b055aaac684380857b66dccf001859
Source dataset
uspto-grants-2004_07
Patent number
US06767916B2

Reaction notes

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