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3-(Trifluoromethoxy)benzoic acid → (2Z)-2-(3-butyl-5-methyl-1,3,4-thiadiazol-2(3H)-ylidene)-1-[3-(trifluoromethoxy)phenyl]ethanone

HRID 448049
Notes
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Reaction equation

HRID 448049 reaction equation
[F:1][C:2]([F:14])([F:13])[O:3][C:4]1[CH:5]=[C:6]([CH:10]=[CH:11][CH:12]=1)[C:7]([OH:9])=O.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C.[I-].[CH2:49]([N+:53]1[N:57]=[C:56]([CH3:58])[S:55][C:54]=1[CH3:59])[CH2:50][CH2:51][CH3:52]>>[CH2:49]([N:53]1[N:57]=[C:56]([CH3:58])[S:55]/[C:54]/1=[CH:59]\[C:7]([C:6]1[CH:10]=[CH:11][CH:12]=[C:4]([O:3][C:2]([F:1])([F:14])[F:13])[CH:5]=1)=[O:9])[CH2:50][CH2:51][CH3:52]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 4

HCID 660963-(Trifluoromethoxy)benzoic acidHCID 81531DiisopropylethylamineHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 691879173-Butyl-2,5-dimethyl-1,3,4-thiadiazol-3-ium iodide

Product 1

HCID 24956062
(2Z)-2-(3-butyl-5-methyl-1,3,4-thiadiazol-2(3H)-ylidene)-1-[3-(trifluoromethoxy)phenyl]ethanone

Procedure

In a 20 mL vial 3-(trifluoromethoxy)benzoic acid (0.9 mL of 0.2 M in DMA, 1.10 equiv) was added followed by the addition of HATU (76 mg in 0.7 mL of DMA, 0.2 mmol, 1.20 equiv.), DIEA (51 mg in 0.7 mL of DMA, 0.4 mmol, 2.40 equiv.), and finally 3-butyl-2,5-dimethyl-1,3,4-thiadiazol-3-ium iodide (49 mg in 0.7 mL of DMA, 0.17 mmol, 1 equiv.). The mixture was shaken overnight at room temperature and then concentrated in vacuo. The resulting residue was taken up in 1:1 DMSO/MeOH and purified by reverse phase HPLC using a method analogous to that described in Example 53 to provide the title compound. 1H NMR (500 MHz, DMSO-d6/D2O) δ ppm 0.90 (t, 3H) 1.27-1.42 (m, 2 H) 1.69-1.80 (m, 2 H) 2.49 (s, 3 H) 4.27 (t, 2 H) 6.78 (s, 1 H) 7.43-7.53 (m, 1 H) 7.58-7.65 (m, 1 H) 7.92 (s, 1 H) 8.03-8.11 (m, 1 H); MS (ESI) m/z 359 (M+H)+.

Workup

  1. concentrationconcentrated in vacuo
  2. custompurified by reverse phase HPLC

Sources & evidence

ORD record
ord-aff208a78a8648fdbe77b90673cee48e
Source dataset
uspto-grants-2013_07
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08481574B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes