N'-((2R,3S)-2-(3-Chloro-4-cyano-2-ethylphenylamino)-3-hydroxybutanoyl)-4-cyanobenzohydrazide → 2-Chloro-4-((1R,2S)-1-(5-(4-cyanophenyl)-1,3,4-oxadiazol-2-yl)-2-hydroxypropylamino)-3-ethylbenzonitrile

HRID 1254723Notes

Reaction equation

HRID 1254723 reaction equation
[Cl:1][C:2]1[C:3]([CH2:29][CH3:30])=[C:4]([NH:10][C@H:11]([C@@H:26]([OH:28])[CH3:27])[C:12]([NH:14][NH:15][C:16](=O)[C:17]2[CH:22]=[CH:21][C:20]([C:23]#[N:24])=[CH:19][CH:18]=2)=[O:13])[CH:5]=[CH:6][C:7]=1[C:8]#[N:9].C(NP1(N(CC)CC)N(C)CCCN1C)(C)(C)C>C1COCC1>[Cl:1][C:2]1[C:3]([CH2:29][CH3:30])=[C:4]([NH:10][C@@H:11]([C:12]2[O:13][C:16]([C:17]3[CH:18]=[CH:19][C:20]([C:23]#[N:24])=[CH:21][CH:22]=3)=[N:15][N:14]=2)[C@@H:26]([OH:28])[CH3:27])[CH:5]=[CH:6][C:7]=1[C:8]#[N:9]

Participants

4

Reactant 2

HCID 67005914N'-((2R,3S)-2-(3-Chloro-4-cyano-2-ethylphenylamino)-3-hydroxybutanoyl)-4-cyanobenzohydrazideHCID 178464497HCID 178464497, compound

Product 1

HCID 441995832-Chloro-4-((1R,2S)-1-(5-(4-cyanophenyl)-1,3,4-oxadiazol-2-yl)-2-hydroxypropylamino)-3-ethylbenzonitrile

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of N′-((2R,3S)-2-(3-chloro-4-cyano-2-ethylphenylamino)-3-hydroxybutanoyl)-4-cyanobenzohydrazide (310 mg, 0.73 mmol) in anhydrous THF (20 mL) at room temperature was added 2-tert-butylamino-2-diethylamino-1,3-dimethyl perhydro-1,3,2-diazaphosphorine on polystyrene (2.2 mmol base/g) (1.0 g) followed by p-TSCl (167 mg, 0.88 mmol) and the mixture was stirred for 1 h. The mixture was filtered under suction and the residue washed with acetone (200 mL) followed by MeOH (200 mL). The filtrate was concentrated and subjected to flash column chromatography [EtOAc-hexanes (2:1)]. The fourth fraction was the desired 2-chloro-4-((1R,2S)-1-(5-(4-cyanophenyl)-1,3,4-oxadiazol-2-yl)-2-hydroxypropylamino)-3-ethylbenzonitrile (45 mg, 15%).). 1H NMR (500 MHz, acetone-d6, δ in ppm) 8.20 (d, J=8.6 Hz, 2H), 7.99 (d, J=8.6 Hz, 2H), 7.48 (d, J=8.6 Hz, 1H), 6.86 (d, J=8.6 Hz, 1H), 5.79 (d, J=8.3 Hz, 1H), 5.18 (dd, J=3.3 Hz, 8.3 Hz, 1H), 4.85 (d, J=5.1 Hz, 1H), 4.68-4.60 (m, 1H), 2.98-2.88 (m, 2H), 1.43 (d, J=6.4 Hz, 3H) and 1.2 (t, J=7.6 Hz, 3H).

Workup

  1. filtrationThe mixture was filtered under suction
  2. washthe residue washed with acetone (200 mL)
  3. concentrationThe filtrate was concentrated

Sources & evidence

ORD record
ord-899f6e2ee9aa49c68b65a416640d511b
Source dataset
uspto-grants-2013_06
Patent number
US08455525B2

Reaction notes

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