Oxygen → HCID 44591802, compound

HRID 2098352Notes

Reaction equation

HRID 2098352 reaction equation
O=O.[CH3:3][O:4]/[C:5](=[CH:9]\[C:10]1[C:15]2[S:16][CH:17]=[CH:18][C:14]=2[C:13]([O:19][CH2:20][CH2:21][C:22]2[N:23]=[C:24]([C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=3)[O:25][C:26]=2[CH3:27])=[CH:12][CH:11]=1)/[C:6]([OH:8])=[O:7].C1([C@@H](N)C)C=CC=CC=1.[H][H]>C1COCC1.ClCCl>[CH3:3][O:4][C@H:5]([CH2:9][C:10]1[C:15]2[S:16][CH:17]=[CH:18][C:14]=2[C:13]([O:19][CH2:20][CH2:21][C:22]2[N:23]=[C:24]([C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=3)[O:25][C:26]=2[CH3:27])=[CH:12][CH:11]=1)[C:6]([OH:8])=[O:7]

Participants

7

Reactant 4

HCID 977OxygenHCID 758181-Phenethylamine, (-)-HCID 54578728(Z)-2-Methoxy-3-{4-[2-(5-methyl-2-phenyl-oxazol-4-yl)-ethoxy]-benzo[b]thiophen-7-yl}-acrylic AcidHCID 178418361HCID 178418361, compound

Product 1

HCID 44591802HCID 44591802, compound

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolvent2×HCID 8028TetrahydrofuranSolvent

Procedure

In a glove box (O2 content≦2 ppm), a 50-ml stainless steel autoclave was charged with 0.66 mg of [Ru(η5-2,4-DMP)((R)—(S)—PPF—PtBu2)(NCMe)]BF4 (0.0008 mmol, S/C 3,000) and 5 ml of dichloromethane. The resulting violet solution was stirred for 2 h at r.t. Then, 1.00 g of (Z)-2-methoxy-3-{4-[2-(5-methyl-2-phenyl-oxazol-4-yl)-ethoxy]-benzo[b]thiophen-7-yl}-acrylic acid (2.30 mmol), 2.5 ml of dichloromethane, 7.5 ml of THF and 0.06 ml of (S)-1-phenylethylamine (0.47 mmol) were added. The autoclave was sealed and the hydrogenation was run under stirring at 40° C. under 30 bar of hydrogen. After 16 h the autoclave was opened and the yellowish solution was rotary evaporated to dryness (50° C./5 mbar) to afford (R)-2-methoxy-3-{4-[2-(5-methyl-2-phenyl-oxazol-4-yl)-ethoxy]-benzo[b]thiophen-7-yl}-propionic acid (Acid I) as a white solid with a chemical purity of 99.5% (99.9% conversion) and an enantiomeric purity of 89%.

Workup

  1. customThe autoclave was sealed
  2. waitAfter 16 h the autoclave was opened
  3. customthe yellowish solution was rotary evaporated to dryness (50° C./5 mbar)

Sources & evidence

ORD record
ord-4a7db1c37bb24303bb68f815ea46d512
Source dataset
uspto-grants-2013_05
Patent number
US08450496B2

Reaction notes

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