Trifluoroacetic acid → HCID 67279381, compound

HRID 1046949Notes

Reaction equation

HRID 1046949 reaction equation
C(O[C:6]([NH:8][NH:9][C:10](=[S:19])[C:11]1[CH:16]=[CH:15][C:14]([F:17])=[C:13]([F:18])[CH:12]=1)=[O:7])(C)(C)C.C(OC(NNC(=O)C1C=CC(F)=CC=1)=O)(C)(C)C.C(O)(C(F)(F)F)=O.CCN(C(C)C)C(C)C.[CH3:54][O:55][C:56](=[O:74])[C:57]1[CH:62]=[CH:61][CH:60]=[C:59]([C:63]2[O:64][C:65]3[CH:71]=[CH:70][CH:69]=[C:68]([CH:72]=O)[C:66]=3[N:67]=2)[CH:58]=1.[F:75][C:76]1[CH:84]=[C:83]([F:85])[CH:82]=[C:81]([F:86])[C:77]=1C(Cl)=O>C(Cl)Cl>[CH3:54][O:55][C:56](=[O:74])[C:57]1[CH:62]=[CH:61][CH:60]=[C:59]([C:63]2[O:64][C:65]3[CH:71]=[CH:70][CH:69]=[C:68]([CH:72]4[N:8]([C:6](=[O:7])[C:77]5[C:76]([F:75])=[CH:84][C:83]([F:85])=[CH:82][C:81]=5[F:86])[N:9]=[C:10]([C:11]5[CH:16]=[CH:15][C:14]([F:17])=[C:13]([F:18])[CH:12]=5)[S:19]4)[C:66]=3[N:67]=2)[CH:58]=1

Participants

8

Reactant 6

HCID 6422Trifluoroacetic acidHCID 81531DiisopropylethylamineHCID 1448952,4,6-Trifluorobenzoyl chlorideHCID 67279032tert-Butyl 2-(4-fluorobenzoyl)hydrazine-1-carboxylateHCID 860661063-(4-Formyl-benzooxazol-2-yl)-benzoic acid methyl esterHCID 86637600HCID 86637600, compound

Product 1

HCID 67279381HCID 67279381, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

N′-(3,4-Difluoro-thiobenzoyl)-hydrazinecarboxylic acid tert-butyl ester (0.1 mmol) prepared as described in example 3 for N′-(4-fluoro-benzoyl)-hydrazinecarboxylic acid tert-butyl ester, is treated with TFA (1 mmol) in dry CH2Cl2 (1 mL) at room temperature for 30 minutes. Solvent is removed and the residue is dissolved in dry CH2Cl2 (1 mL). DIEA (0.57 mmol) is added to the solution and the mixture is treated with 3-(4-formyl-benzooxazol-2-yl)-benzoic acid methyl ester (0.064 mmol) in the presence of 4 Å molecular sieves. 2,4,6-Trifluorobenzoyl chloride (0.15 mmol) is added after 5 minutes. The mixture is kept at room temperature for 16 hours and purified by preparative HPLC (20-100% MeCN/H2O) to yield 3-{4-[5-(3,4-difluoro-phenyl)-3-(2,4,6-trifluoro-benzoyl)-2,3-dihydro-[1,3,4]thiadiazol-2-yl]-benzooxazol-2-yl}-benzoic acid methyl ester. LC/MS (ES+): (M+1) 610.0, (M+Na) 632.0.

Workup

  1. customSolvent is removed
  2. dissolutionthe residue is dissolved in dry CH2Cl2 (1 mL)
  3. custompurified by preparative HPLC (20-100% MeCN/H2O)

Sources & evidence

ORD record
ord-c8b3736c106640eca8f3a2eb415c1839
Source dataset
uspto-grants-2013_10
Patent number
US08569345B2

Reaction notes

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