Trifluoroacetic anhydride → N-{2-[5-(2-Cyanoethyl)-1,3-thiazol-2-yl]-1H-indol-7-yl}-N-methylthiophene-2-sulfonamide

HRID 1851548Notes

Reaction equation

HRID 1851548 reaction equation
[CH3:1][N:2]([S:22]([C:25]1[S:26][CH:27]=[CH:28][CH:29]=1)(=[O:24])=[O:23])[C:3]1[CH:4]=[CH:5][CH:6]=[C:7]2[C:11]=1[NH:10][C:9]([C:12]1[S:13][C:14]([CH2:17][CH2:18][C:19]([NH2:21])=O)=[CH:15][N:16]=1)=[CH:8]2.FC(F)(F)C(OC(=O)C(F)(F)F)=O>N1C=CC=CC=1>[C:19]([CH2:18][CH2:17][C:14]1[S:13][C:12]([C:9]2[NH:10][C:11]3[C:7]([CH:8]=2)=[CH:6][CH:5]=[CH:4][C:3]=3[N:2]([CH3:1])[S:22]([C:25]2[S:26][CH:27]=[CH:28][CH:29]=2)(=[O:24])=[O:23])=[N:16][CH:15]=1)#[N:21]

Participants

4

Reactant 2

HCID 9845Trifluoroacetic anhydrideHCID 57901592HCID 57901592, compound

Product 1

HCID 57901663N-{2-[5-(2-Cyanoethyl)-1,3-thiazol-2-yl]-1H-indol-7-yl}-N-methylthiophene-2-sulfonamideYield 95%

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

To a mixture of 3-(2-{7-[methyl(2-thienylsulfonyl)amino]-1H-indol-2-yl}-1,3-thiazol-5-yl)propanamide (1.32 g) and pyridine (15 mL) was added trifluoroacetic anhydride (0.90 mL) at 0° C. over 15 min. The reaction mixture was stirred at room temperature for 2 hr and concentrated. 10% Aqueous citric acid solution was added to the residue. The resulting crystals were collected by filtration, washed with water and dried. The obtained crystals were subjected to silica gel column chromatography and the title compound (1.20 g, yield 95%) was obtained as yellow crystals from a fraction eluted with tetrahydrofuran-hexane (2:1, volume ratio). melting point 207-208° C.

Workup

  1. concentrationconcentrated
  2. addition10% Aqueous citric acid solution was added to the residue
  3. filtrationThe resulting crystals were collected by filtration
  4. washwashed with water
  5. customdried

Sources & evidence

ORD record
ord-11ca78c5e3fc4d7a807cc92f6955fd30
Source dataset
uspto-grants-2015_02
Patent number
US08957070B2

Reaction notes

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