HCID 12760922, compound → HCID 15729797, compound

HRID 1904542Notes

Reaction equation

HRID 1904542 reaction equation
[OH:1][C:2]1[CH:14]=[CH:13][C:5]2[C:6]([CH3:12])([CH3:11])[CH:7]=[C:8]([CH3:10])[O:9][C:4]=2[CH:3]=1>[C].[Pd].C(O)C>[OH:1][C:2]1[CH:14]=[CH:13][C:5]2[C:6]([CH3:11])([CH3:12])[CH2:7][CH:8]([CH3:10])[O:9][C:4]=2[CH:3]=1

Participants

4

Reactant 1

HCID 12760922HCID 12760922, compound

Product 1

HCID 15729797HCID 15729797, compoundYield 86%

Reagents, catalysts & solvents 2

HCID 178418390HCID 178418390, compoundCatalystHCID 702EthanolSolvent

Procedure

A 100 ml autoclave was charged with 6.0 g of 7-hydroxy-2,4,4-trimethyl-4H-1-benzopyran synthesized by the method of Japanese Laid-Open Patent Publication No. 5475/1981, 1.0 g of 5% palladium-carbon and 20 ml of ethanol, and hydrogenation was carried out at 85° C. The resulting product was recrystallized from n-hexanetoluene to give 5.2 g (86%) of the desired product as colorless crystals (melting point 97°-98° C.).

Workup

  1. customsynthesized by the method of Japanese Laid-Open Patent Publication No
  2. customwas carried out at 85° C
  3. customThe resulting product was recrystallized from n-hexanetoluene

Sources & evidence

ORD record
ord-e6c2435877674706ba3cd34d5a9826bf
Source dataset
uspto-grants-1989_06
Patent number
US04838924

Reaction notes

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