3-Fluorobenzothiohydrazide → Tert-butyl 3-(5-(3-fluorophenyl)-2-phenyl-2,3-dihydro-1,3,4-thiadiazol-2-yl)butylcarbamate

HRID 270496Notes

Reaction equation

HRID 270496 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([CH:9]=[CH:10][CH:11]=1)[C:5](=[S:8])[NH:6][NH2:7].[CH3:12][CH:13]([C:24](=O)[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1)[CH2:14][CH2:15][NH:16][C:17](=[O:23])[O:18][C:19]([CH3:22])([CH3:21])[CH3:20]>C(O)C.C(Cl)Cl.C(O)(=O)C>[F:1][C:2]1[CH:3]=[C:4]([C:5]2[S:8][C:24]([CH:13]([CH3:12])[CH2:14][CH2:15][NH:16][C:17](=[O:23])[O:18][C:19]([CH3:21])([CH3:20])[CH3:22])([C:25]3[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=3)[NH:7][N:6]=2)[CH:9]=[CH:10][CH:11]=1

Participants

5

Reactant 2

HCID 552816163-FluorobenzothiohydrazideHCID 67214951Tert-butyl 3-methyl-4-oxo-4-phenylbutylcarbamate

Product 1

HCID 67215287Tert-butyl 3-(5-(3-fluorophenyl)-2-phenyl-2,3-dihydro-1,3,4-thiadiazol-2-yl)butylcarbamateYield 48.4%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidCatalystHCID 21584144Dichloromethane ethanolSolvent

Procedure

To a solution of 3-fluorobenzothiohydrazide (300 mg, 1.76 mmol) in ethanol/DCM (6 mL/2 mL) was added tert-butyl 3-methyl-4-oxo-4-phenylbutylcarbamate (538 mg, 1.94 mmol). After stirring at room temperature for 16 hours, acetic acid (3 drops) was added and the mixture stirred for another 48 hours. The reaction mixture was then concentrated under reduced pressure and chromatographed (9:1 hexanes/ethyl acetate) to provide the product (366 mg, 48%) as a mixture of diastereomers as a yellow foam.

Workup

  1. stirringthe mixture stirred for another 48 hours
  2. concentrationThe reaction mixture was then concentrated under reduced pressure
  3. customchromatographed (9:1 hexanes/ethyl acetate)

Sources & evidence

ORD record
ord-ab255af9eb57458c9a91732835b0937b
Source dataset
uspto-grants-2008_11
Patent number
US07449486B2

Reaction notes

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