Ethanol → HCID 15599363, compound

HRID 867455Notes

Reaction equation

HRID 867455 reaction equation
[OH:1][CH2:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1/[CH:9]=[CH:10]/[CH2:11][C:12]1[C:20]([OH:21])=[CH:19][C:15]2[CH2:16][CH2:17][O:18][C:14]=2[CH:13]=1.C(O)C>C(O)(=O)C.O=[Pt]=O.C(OCC)C>[OH:1][CH2:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[CH2:9][CH2:10][CH2:11][C:12]1[C:20]([OH:21])=[CH:19][C:15]2[CH2:16][CH2:17][O:18][C:14]=2[CH:13]=1

Participants

6

Reactant 2

HCID 702EthanolHCID 6438824120694-96-4

Product 1

HCID 15599363HCID 15599363, compoundYield 49.2%

Reagents, catalysts & solvents 3

HCID 345198Adams' catalystCatalystHCID 176Acetic AcidSolventHCID 3283Diethyl EtherSolvent

Procedure

6-(3-(2-hydroxymethylphenyl)-trans-prop-2-enyl)-5-hydroxy-2,3-dihydrobenzofuran (2.82 g; 0.01 moles) was dissolved in acetic acid (35 ml) and ethyl alcohol (10 ml) and hydrogenated at 40 psi at room temperature using PtO2 (0.30 g) as a catalyst. The reduction was complete in approximately 3 minutes with a slight exotherm. The catalyst was removed via suction filtration through a bed of celite. The bed was washed with ethyl alcohol (2×10 ml) and the filtrate was relieved of solvent in vacuo to afford a crude gum. The gum was dissolved in ethyl ether (50 ml) and was washed sequentially with brine (2×50 ml) and saturated NaHCO3 solution (2×50 m). The organic layer was dried over MgSO4, filtered, and the filtrate evaported in vacuo to yield a crude solid. Recrystallization from ethyl acetate/n-hexane produced 6-(3-(2-hydroxymethyl-phenyl)propyl)-5-hydroxy-2,3-dihydrobenzofuran as white needles (1.4 g, 49%, m.p. 110°-111.5° C.).

Workup

  1. customat room temperature
  2. customThe catalyst was removed via suction filtration through a bed of celite
  3. washThe bed was washed with ethyl alcohol (2×10 ml)
  4. customto afford a crude gum
  5. washwas washed sequentially with brine (2×50 ml) and saturated NaHCO3 solution (2×50 m)
  6. dry with materialThe organic layer was dried over MgSO4
  7. filtrationfiltered
  8. customto yield a crude solid
  9. customRecrystallization from ethyl acetate/n-hexane

Sources & evidence

ORD record
ord-3ddbfea6fecf4b2aa2595c9b47e5f561
Source dataset
uspto-grants-1988_10
Patent number
US04775679

Reaction notes

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