Riluzole → N1-[6-(trifluoromethoxy)-1,3-benzothiazol-2-yl]-2-2-methoxy-5-[(E)-3-oxo-3-(3,4,5-trimethoxyphenyl)-1-propenyl]phenoxyacetamide

HRID 512569Notes

Reaction equation

HRID 512569 reaction equation
[F:1][C:2]([F:15])([F:14])[O:3][C:4]1[CH:13]=[CH:12][C:7]2[N:8]=[C:9]([NH2:11])[S:10][C:6]=2[CH:5]=1.C(N=C=NCCCN(C)C)C.ON1C2C=CC=CC=2N=N1.[CH3:37][O:38][C:39]1[CH:49]=[CH:48][C:47](/[CH:50]=[CH:51]/[C:52](=[O:65])[C:53]2[CH:58]=[C:57]([O:59][CH3:60])[C:56]([O:61][CH3:62])=[C:55]([O:63][CH3:64])[CH:54]=2)=[CH:46][C:40]=1[O:41][CH2:42][C:43](O)=[O:44]>ClCCl.O>[F:15][C:2]([F:1])([F:14])[O:3][C:4]1[CH:13]=[CH:12][C:7]2[N:8]=[C:9]([NH:11][C:43](=[O:44])[CH2:42][O:41][C:40]3[CH:46]=[C:47](/[CH:50]=[CH:51]/[C:52](=[O:65])[C:53]4[CH:54]=[C:55]([O:63][CH3:64])[C:56]([O:61][CH3:62])=[C:57]([O:59][CH3:60])[CH:58]=4)[CH:48]=[CH:49][C:39]=3[O:38][CH3:37])[S:10][C:6]=2[CH:5]=1

Participants

7

Reactant 4

HCID 5070RiluzoleHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 569681902-{2-methoxy-5-[(E)-3-oxo-3-(3,4,5-trimethoxy phenyl)-1-propenyl]phenoxy}acetic acid

Product 1

HCID 60148075N1-[6-(trifluoromethoxy)-1,3-benzothiazol-2-yl]-2-2-methoxy-5-[(E)-3-oxo-3-(3,4,5-trimethoxyphenyl)-1-propenyl]phenoxyacetamideYield 805.1%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
25 °C

Procedure

To a solution of 6-(trifluoromethoxy)-2-aminobenzothiazole (234 mg, 1.0 mmol) in dichloromethane (20 mL) was added 1-Ethyl-3-(3-Dimethylaminopropyl)carbodiimide (EDC) (191 mg, 1.0 mmol) and 1-hydroxy-1,2,3-benzotriazole (HOBt) (13.5 mg, 0.1 mmol). Then added 2-{2-methoxy-5-[(E)-3-oxo-3-(3-(3,4,5-trimethoxy phenyl)-1-propenyl]phenoxy}acetic acid (2) (402 mg, 0.1 mmol) and the reaction mixture was stirred at a temperature of 25° C. for 24 h and the reaction was monitored by TLC. Then to this water is added and extracted with dichloromethane. The solvent was evaporated under vacuum to afford the crude product. This was further purified by column chromatography using ethyl acetate and hexane as solvent system to obtain the pure product (9j) (498 mg, 80% yield)

Workup

  1. extractionextracted with dichloromethane
  2. customThe solvent was evaporated under vacuum
  3. customto afford the crude product
  4. customThis was further purified by column chromatography

Sources & evidence

ORD record
ord-4d1fa148c6224528bfa6dd059f96ac31
Source dataset
uspto-grants-2015_08
Patent number
US09102638B2

Reaction notes

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