Acetic Acid → HCID 53656302, compound

HRID 258626Notes

Reaction equation

HRID 258626 reaction equation
[N+:1]([CH2:4][CH:5]1[CH2:13][C:8]2([O:12][CH2:11][CH2:10][O:9]2)[CH:7]([CH2:14][CH:15]=[CH:16][CH2:17][CH2:18][CH2:19][C:20]([OH:22])=[O:21])[CH:6]1[CH:23]=[CH:24][C:25](=[O:31])[CH2:26][CH2:27][CH2:28][CH2:29][CH3:30])([O-:3])=[O:2].[C:32]1([Mg]Br)[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1.[Cl-].[NH4+].C(O)(=O)C>O1CCCC1>[N+:1]([CH2:4][CH:5]1[CH2:13][C:8]2([O:9][CH2:10][CH2:11][O:12]2)[CH:7]([CH2:14][CH:15]=[CH:16][CH2:17][CH2:18][CH2:19][C:20]([OH:22])=[O:21])[CH:6]1[CH:23]=[CH:24][C:25]([OH:31])([C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1)[CH2:26][CH2:27][CH2:28][CH2:29][CH3:30])([O-:3])=[O:2]

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 25517Ammonium ChlorideHCID 70607475HCID 70607475, compoundHCID 178418255HCID 178418255, compound

Product 1

HCID 53656302HCID 53656302, compound

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

A solution of 1.88 g. of 7-[8-nitromethyl-7-(3-oxo-1-octenyl)-1,4-dioxaspiro[4.4]non-6-yl]-5-heptenoic acid in 80 ml. of tetrahydrofuran was treated at -10° C. with 6.6 ml. of 3 M phenyl magnesium bromide in tetrahydrofuran and was stirred at 0° C. for one hour. The reaction mixture was added to aqueous ammonium chloride solution, acidified with acetic acid and extracted with ether. After washing with water and drying with magnesium sulfate, the extract was evaporated and the residue chromatographed on silica. Elution with 30% ethyl acetate in hexane gave 0.90 g. of the title product as an oil, λmaxfilm 3.00 (shoulder), 3.50, 5.88, 6.28, 6.47, 6.95, 7.25, 13.30, 14.35 μ. NMR: δ 3.93 (S, 4, ketal), 4.35 (M, 2, --CH2NO2), 5.15-6.05 (M, 4, olefinic --H), 5.88 (S, 2, -OH), 7.45 (M, 5, aromatic-HO ppm. Mass spectrum: M+ at m/e 515 (theory 515), M+--H2O at m/e 497.2776 (theory 497.2776.

Workup

  1. extractionextracted with ether
  2. washAfter washing with water
  3. dry with materialdrying with magnesium sulfate
  4. customthe extract was evaporated
  5. customthe residue chromatographed on silica
  6. washElution with 30% ethyl acetate in hexane
  7. customgave 0.90 g

Sources & evidence

ORD record
ord-1c534bc540d943c2a0d130df532bac92
Source dataset
uspto-grants-1977_07
Patent number
US04034002

Reaction notes

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