Hydrochloric Acid → HCID 86586354, compound

HRID 989767Notes

Reaction equation

HRID 989767 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[CH:19]=[C:20]([N+:25]([O-])=O)[C:21]([O:23][CH3:24])=[CH:22][C:16]=3[O:15][CH2:14]2)(=[O:10])=[O:9])=[CH:4][CH:3]=1.Cl.[H][H]>C(OCC)(=O)C.[Pd]>[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[CH:19]=[C:20]([NH2:25])[C:21]([O:23][CH3:24])=[CH:22][C:16]=3[O:15][CH2:14]2)(=[O:9])=[O:10])=[CH:4][CH:3]=1

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 86586355HCID 86586355, compoundHCID 178418361HCID 178418361, compound

Product 1

HCID 86586354HCID 86586354, compound

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 8857Ethyl AcetateSolvent

Procedure

To a mixture of 3.74 g (9.40 mmole) of [(2S)-7-nitro-6-methoxy-2,3-dihydro-1,4-benzodioxin-2y]methyl 4-methylbenzenesulfonate and 2.5 mL of 4 N isopropanolic HCl in 200 mL of ethyl acetate was added 0.45 g of 10% palladium on carbon and the mixture treated with 50 psi of hydrogen on a Parr apparatus for 15 hours. The catalyst was then removed by filtration through celite and the filtrate concentrated in vacuum to give 3.41 g of the (R)-enantiomer of the title compound as beige solid hydrochloride salt. 1H-NMR (DSMO-d6): broad singlet 9.8 δ (2 H); doublet 7.8 δ (2 H); doublet 7.45 δ (2 H); singlet 6.85 δ (1 H); singlet 6.75 δ (1 H); multiplet 4.2-4.45 δ (4 H); multiplet 4.0 δ (1 H); singlet 3.8 δ (3 H); singlet 2.5 δ (3 H).

Workup

  1. customThe catalyst was then removed by filtration through celite
  2. concentrationthe filtrate concentrated in vacuum

Sources & evidence

ORD record
ord-d41264c206154a61a14a5c1550818cbb
Source dataset
uspto-grants-2002_10
Patent number
US06458802B1

Reaction notes

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