Sodium Bicarbonate → HCID 86586521, compound

HRID 1836964Notes

Reaction equation

HRID 1836964 reaction equation
[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([O:11][CH2:12][C@@H:13]2[O:18][C:17]3[C:19]([CH:26]=[CH:27][CH3:28])=[C:20]([N+:23]([O-])=O)[CH:21]=[CH:22][C:16]=3[O:15][CH2:14]2)(=[O:10])=[O:9])=[CH:4][CH:3]=1.C(=O)(O)[O-].[Na+]>C(OCC)(=O)C>[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([S:8]([O:11][CH2:12][CH:13]2[O:18][C:17]3[C:19]([CH:26]=[CH:27][CH3:28])=[C:20]([NH2:23])[CH:21]=[CH:22][C:16]=3[O:15][CH2:14]2)(=[O:10])=[O:9])=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 516892Sodium BicarbonateHCID 86586347HCID 86586347, compound

Product 1

HCID 86586521HCID 86586521, compound

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

10.0 g (24.0 mmole) of {(2R)-7-nitro-8-[1-propenyl]-2,3-dihydro-1,4-benzo-dioxin-2-yl}methyl 4-methylbenzenesulfonate and 28.0 g (123 mmole) of stannous chloride dihydrate were combined and heated to 70° C. in ethyl acetate (250 mL) for 6 hours under nitrogen. After cooling to room temperature, the reaction mixture was poured into ice and was made basic with sodium bicarbonate. It was then extracted with ethyl acetate, washed with brine, dried over magnesium sulfate, filtered and evaporated to a brown oil. The crude oil was then chromatographed on silica gel with 50% hexane/methylene chloride to remove impurities and the desired product was eluted with 0.5% methanol/CH2Cl2 to give 8.16 g (91%) of the (R)-enantiomer of the title compound as a yellow oil. For analytical purposes, 50 mg of the yellow oil was crystallized from ethanol with the addition of fumaric acid to give the fumarate of the title compound. MS (ESI) m/z 375 (M+H)+.

Workup

  1. additionthe reaction mixture was poured into ice
  2. extractionIt was then extracted with ethyl acetate
  3. washwashed with brine
  4. dry with materialdried over magnesium sulfate
  5. filtrationfiltered
  6. customevaporated to a brown oil
  7. customThe crude oil was then chromatographed on silica gel with 50% hexane/methylene chloride
  8. customto remove impurities
  9. washthe desired product was eluted with 0.5% methanol/CH2Cl2

Sources & evidence

ORD record
ord-fc13f84d66294f61ad201258e9388213
Source dataset
uspto-grants-2004_08
Patent number
US06780860B2

Reaction notes

Loading…