Hydrochloric Acid → HCID 86713140, compound

HRID 713619Notes

Reaction equation

HRID 713619 reaction equation
[OH:1][C:2]1([C:17]#[C:18]/[C:19](/[C:26]([F:29])([F:28])[F:27])=[CH:20]\[C:21]([O:23][CH2:24][CH3:25])=[O:22])[C:13]([CH3:15])([CH3:14])[CH2:12][C:5]2(OC(C)C(C)[O:6]2)[CH:4]=[C:3]1[CH3:16].Cl.O>CC(C)=O>[OH:1][C:2]1([C:17]#[C:18]/[C:19](/[C:26]([F:27])([F:28])[F:29])=[CH:20]\[C:21]([O:23][CH2:24][CH3:25])=[O:22])[C:13]([CH3:14])([CH3:15])[CH2:12][C:5](=[O:6])[CH:4]=[C:3]1[CH3:16]

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 962WaterHCID 86713141HCID 86713141, compound

Product 1

HCID 86713140HCID 86713140, compoundYield 79%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

Ethyl (2E)-5-(8-hydroxy-2,3,7,9,9-pentamethyl-1,4-dioxaspiro[4.5]dec-6-en-8-yl)-3-(trifluoromethyl)pent-2-en-4-ynoate (200 mg, 0.48 mmol) was dissolved in acetone (5 ml) under argon in a round-bottom flask, and 10% strength hydrochloric acid was added. The resulting reaction solution was stirred at room temperature for 45 minutes, and water was then added. After removing acetone under reduced pressure, the aqueous phase was extracted repeatedly with dichloromethane. The combined organic phases were dried over magnesium sulfate, filtered and concentrated under reduced pressure. By column chromatography purification of the resulting crude product (ethyl acetate/heptane gradient), ethyl (2E)-5-(1-hydroxy-2,6,6-trimethyl-4-oxocyclohex-2-en-1-yl)-3-(trifluoromethyl)pent-2-en-4-ynoate (130 mg, 79% of theory) was obtained in the form of a colorless oil. 1H-NMR (400 MHz, CDCl3 δ, ppm) 6.68 (s, 1H), 5.90 (s, 1H), 4.26 (q, 2H), 2.58 (m, 2H), 2.44 (d, 1H), 2.15 (s, 3H), 1.31 (t, 3H), 1.25 (s, 3H), 1.15 (s, 3H).

Workup

  1. customThe resulting reaction solution
  2. customAfter removing acetone under reduced pressure
  3. extractionthe aqueous phase was extracted repeatedly with dichloromethane
  4. dry with materialThe combined organic phases were dried over magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customBy column chromatography purification of the resulting crude product (ethyl acetate/heptane gradient)

Sources & evidence

ORD record
ord-597a2761c09b4f6680fbdb01a91d2913
Source dataset
uspto-grants-2015_11
Patent number
US09185914B2

Reaction notes

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