HCID 5324401, compound → HCID 21270210, compound

HRID 1194468Notes

Reaction equation

HRID 1194468 reaction equation
[OH:1][C:2]1[CH:20]=[CH:19][C:5]2[C:6](=O)[C:7]([C:10]3[CH:15]=[CH:14][C:13]([O:16][CH3:17])=[CH:12][CH:11]=3)=[CH:8][O:9][C:4]=2[C:3]=1[CH3:21]>O>[OH:1][C:2]1[CH:20]=[CH:19][C:5]2[CH2:6][CH:7]([C:10]3[CH:15]=[CH:14][C:13]([O:16][CH3:17])=[CH:12][CH:11]=3)[CH2:8][O:9][C:4]=2[C:3]=1[CH3:21]

Participants

3

Reactant 1

HCID 5324401HCID 5324401, compound

Product 1

HCID 21270210HCID 21270210, compound

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

As example 26, but using 7-hydroxy-8-methyl-3-(4-methoxyphenyl)-4H-1-benzopyran-4-one (28 mg) instead of 7-hydroxy-8-methyl-3-(4-methylphenyl)-4H-1-benzopyran-4-one. A crystalline precipitate is formed when water is added; it is filtrated off and washed with water. 3,4-Dihydro-7-hydroxy-8-methyl-3-(4-methoxyphenyl)-2H-1-benzopyran is obtained; m.p. 140°-141°.

Workup

  1. additionis added
  2. filtrationit is filtrated off
  3. washwashed with water

Sources & evidence

ORD record
ord-972fe3188379404e9c4210373ada6619
Source dataset
uspto-grants-1989_03
Patent number
US04814346

Reaction notes

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