1,2-Dichloroethane → N'-((2R,3S)-2-(3-chloro-7-cyanobenzo[b]thiophen-4-ylamino)-3-hydroxybutanoyl)-4-cyanobenzohydrazide

HRID 2388580Notes

Reaction equation

HRID 2388580 reaction equation
[Cl:1][C:2]1[C:3]2[C:10]([NH:11][C@H:12]([C@@H:16]([OH:18])[CH3:17])[C:13]([OH:15])=O)=[CH:9][CH:8]=[C:7]([C:19]#[N:20])[C:4]=2[S:5][CH:6]=1.[C:21]([C:23]1[CH:32]=[CH:31][C:26]([C:27]([NH:29][NH2:30])=[O:28])=[CH:25][CH:24]=1)#[N:22].C1C=CC2N(O)N=NC=2C=1.C(Cl)CCl.CCN(CC)CC>C1COCC1.CN(C=O)C>[Cl:1][C:2]1[C:3]2[C:10]([NH:11][C@H:12]([C@@H:16]([OH:18])[CH3:17])[C:13]([NH:30][NH:29][C:27](=[O:28])[C:26]3[CH:25]=[CH:24][C:23]([C:21]#[N:22])=[CH:32][CH:31]=3)=[O:15])=[CH:9][CH:8]=[C:7]([C:19]#[N:20])[C:4]=2[S:5][CH:6]=1

Participants

7

Reactant 5

HCID 111,2-DichloroethaneHCID 8471TriethylamineHCID 757711-HydroxybenzotriazoleHCID 4567324-CyanobenzohydrazideHCID 68543453(2R,3S)-2-(3-chloro-7-cyanobenzo[b]thiophen-4-ylamino)-3-hydroxybutanoic acid

Product 1

HCID 68546596N'-((2R,3S)-2-(3-chloro-7-cyanobenzo[b]thiophen-4-ylamino)-3-hydroxybutanoyl)-4-cyanobenzohydrazideYield 74%

Reagents, catalysts & solvents 1

HCID 21974620tetrahydrofuran N,N-dimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

To a mixture of (2R,3S)-2-(3-chloro-7-cyanobenzo[b]thiophen-4-ylamino)-3-hydroxybutanoic acid (0.77 g, 2.48 mmol), 4-cyanobenzhydrazide (440 mg, 2.73 mmol), HOBt (369 mg, 2.73 mmol) in THF:DMF (1:1) (40 mL) was added EDC (712 mg, 3.71 mmol) and Et3N (0.53 mL, 3.80 mmol) at 0° C. The mixture was stirred at 0° C. for 30 min and then at room temperature overnight. The reaction was quenched by adding water and extracted with EtOAc (300 mL). The EtOAc extracts were washed with water, brine and dried over Na2SO4. Removal of the solvent and purification of the residue gave the title compound N′-((2R,3S)-2-(3-chloro-7-cyanobenzo[b]thiophen-4-ylamino)-3-hydroxybutanoyl)-4-cyanobenzohydrazide (0.83 g, 74%). 1H NMR (400 MHz, Acetone-d6, δ in ppm) 9.82 (b, 2H), 8.10 (d, J=8.2 Hz, 2H), 7.94 (d, J=8.2 Hz, 2H), 7.72 (d, J=8.4 Hz, 1H), 7.70 (s, 1H), 7.53 (d, J=6.8 Hz, 1H), 6.64 (d, J=8.4 Hz, 1H), 4.49 (m, 1H), 4.22 (dd, J=2.9, 6.8 Hz, 1H), 1.41 (d, J=6.4 Hz, 3H).

Workup

  1. customat room temperature
  2. customovernight
  3. customThe reaction was quenched
  4. additionby adding water
  5. extractionextracted with EtOAc (300 mL)
  6. washThe EtOAc extracts were washed with water, brine
  7. dry with materialdried over Na2SO4
  8. customRemoval of the solvent and purification of the residue

Sources & evidence

ORD record
ord-f16bd73a8eba43488ba95ff757e1cc0c
Source dataset
uspto-grants-2012_09
Patent number
US08268872B2

Reaction notes

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