Ethyl 5-phenyl-1,3,4-oxadiazole-2-carboxylate → (3-(4-((Dimethylamino)methyl)-3-methylphenoxy)azetidin-1-yl)(5-phenyl-1,3,4-oxadiazol-2-yl)methanone

HRID 1035188Notes

Reaction equation

HRID 1035188 reaction equation
[NH:1]1[CH2:4][CH:3]([O:5][C:6]2[CH:11]=[CH:10][C:9]([CH2:12][N:13]([CH3:15])[CH3:14])=[C:8]([CH3:16])[CH:7]=2)[CH2:2]1.[C:17]1([C:23]2[O:27][C:26]([C:28](OCC)=[O:29])=[N:25][N:24]=2)[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1>>[CH3:14][N:13]([CH2:12][C:9]1[CH:10]=[CH:11][C:6]([O:5][CH:3]2[CH2:2][N:1]([C:28]([C:26]3[O:27][C:23]([C:17]4[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=4)=[N:24][N:25]=3)=[O:29])[CH2:4]2)=[CH:7][C:8]=1[CH3:16])[CH3:15]

Participants

3

Reactant 2

HCID 651752Ethyl 5-phenyl-1,3,4-oxadiazole-2-carboxylateHCID 666563501-(4-(Azetidin-3-yloxy)-2-methylphenyl)-N,N-dimethylmethanamine

Product 1

HCID 56597852(3-(4-((Dimethylamino)methyl)-3-methylphenoxy)azetidin-1-yl)(5-phenyl-1,3,4-oxadiazol-2-yl)methanoneYield 94.2%

Conditions

Temperature
120 °C

Procedure

Intermediate 20C (0.16 g, 0.73 mmol) and ethyl 5-phenyl-1,3,4-oxadiazole-2-carboxylate (0.17 g, 0.80 mmol) were mixed together in a microwave vial. The vial was sealed and the mixture was then stirred at 120° C. for 2 hours using an oil bath. The mixture was cooled to room temperature. The product was purified by column chromatography eluting with DCM and MeOH (saturated with ammonia)/DCM (gradient, 0.5-2%). The solvent was removed by evaporation and the semi solid residue was triturated with Et2O. There was obtained 0.27 g (93%) of the product as a crystalline solid m.p. 135° C. 1H NMR (600 MHz, CDCl3): δ 2.21 (s, 6H), 2.34 (s, 3H), 3.31 (s, 2H), 4.28-4.35 (m, 1H), 4.59-4.67 (m, 1H), 4.70-4.78 (m, 1H), 5.01-5.15 (m, 2H), 6.54 (d, 1H), 6.60 (s, 1H), 7.15 (d, 1H), 7.49-7.62 (m, 3H), 8.16 (d, 2H), MS (APCI+) m/z 393 [M+H]+, LC purity: 99%.

Workup

  1. customThe vial was sealed
  2. temperatureThe mixture was cooled to room temperature
  3. customThe product was purified by column chromatography
  4. washeluting with DCM and MeOH (saturated with ammonia)/DCM (gradient, 0.5-2%)
  5. customThe solvent was removed by evaporation
  6. customthe semi solid residue was triturated with Et2O

Sources & evidence

ORD record
ord-524c94d88cf842809a18d88acc6e8e41
Source dataset
uspto-grants-2013_10
Patent number
US08546375B2

Reaction notes

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