Methyl morpholine oxide → 3-[4-(Formyl)phenyl]-5-(4-phenyl-5-trifluoromethyl-2-thienyl)-1,2,4-oxadiazole

HRID 898206Notes

Reaction equation

HRID 898206 reaction equation
[OH:1][CH2:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]2[N:13]=[C:12]([C:14]3[S:15][C:16]([C:25]([F:28])([F:27])[F:26])=[C:17]([C:19]4[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=4)[CH:18]=3)[O:11][N:10]=2)=[CH:5][CH:4]=1.C[N+]1([O-])CCOCC1>CC#N.[Ru]([O-])(=O)(=O)=O.C([N+](CCC)(CCC)CCC)CC>[CH:2]([C:3]1[CH:8]=[CH:7][C:6]([C:9]2[N:13]=[C:12]([C:14]3[S:15][C:16]([C:25]([F:27])([F:26])[F:28])=[C:17]([C:19]4[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=4)[CH:18]=3)[O:11][N:10]=2)=[CH:5][CH:4]=1)=[O:1]

Participants

5

Reactant 2

HCID 82029Methyl morpholine oxideHCID 111538793-[4-(Hydroxymethyl)phenyl]-5-(4-phenyl-5-trifluoromethyl-2-thienyl)-1,2,4-oxadiazole

Product 1

HCID 112117363-[4-(Formyl)phenyl]-5-(4-phenyl-5-trifluoromethyl-2-thienyl)-1,2,4-oxadiazoleYield 66.5%

Reagents, catalysts & solvents 2

HCID 178419074HCID 178419074, compoundCatalystHCID 6342AcetonitrileSolvent

Procedure

A mixture of 310 mg (0.77 mmol) of 3-[4-(hydroxymethyl)phenyl]-5-(4-phenyl-5-trifluoromethyl-2-thienyl)-1,2,4-oxadiazole (from Step E), 527 mg (1.5 mmol) of 4-methylmorpholine N-oxide and 500 mg of 4 A molecular sieves in 15 mL of CH3CN was treated with 12 mg (0.034 mmol) of tetrapropylammonium perruthenate and the resulting mixture was stirred ar rt for 2 h. The solids were filtered and the filtrated was concentrated. Chromatography on a Biotage 40 S cartridge using 9:1 v/v hexanes/EtOAc (1 L) as the eluant afforded 205 mg (66%) of the title compound: 1H NMR (500 MHz) δ 7.48 (app s, 5H), 7.93 (app s, 1H), 8.03 (d, J=8.5, 2H), 8.33 (d, J=8.5, 2H), 10.1 (s, 1H).

Workup

  1. filtrationThe solids were filtered
  2. concentrationthe filtrated was concentrated

Sources & evidence

ORD record
ord-0d7ddded33234907b32d6309ce117008
Source dataset
uspto-grants-2008_04
Patent number
US07351725B2

Reaction notes

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