4-Toluenesulfonyl chloride → 2-chloro-4-((1R,2S)-2-hydroxy-1-(5-(4-(methylsulfonyl)phenyl)-1,3,4-oxadiazol-2-yl)propylamino)-3-methylbenzonitrile

HRID 2388423Notes

Reaction equation

HRID 2388423 reaction equation
[Cl:1][C:2]1[C:3]([CH3:31])=[C:4]([NH:10][C@H:11]([C@@H:28]([OH:30])[CH3:29])[C:12]([NH:14][NH:15][C:16](=O)[C:17]2[CH:22]=[CH:21][C:20]([S:23]([CH3:26])(=[O:25])=[O:24])=[CH:19][CH:18]=2)=[O:13])[CH:5]=[CH:6][C:7]=1[C:8]#[N:9].S(Cl)(C1C=CC(C)=CC=1)(=O)=O.C(N=P1(N(CC)CC)N(C)CCCN1C)(C)(C)C>C1COCC1>[Cl:1][C:2]1[C:3]([CH3:31])=[C:4]([NH:10][C@@H:11]([C:12]2[O:13][C:16]([C:17]3[CH:18]=[CH:19][C:20]([S:23]([CH3:26])(=[O:24])=[O:25])=[CH:21][CH:22]=3)=[N:15][N:14]=2)[C@@H:28]([OH:30])[CH3:29])[CH:5]=[CH:6][C:7]=1[C:8]#[N:9]

Participants

5

Reactant 3

HCID 73974-Toluenesulfonyl chlorideHCID 35138512-((1,1-Dimethylethyl)imino)-N,N-diethylhexahydro-1,3-dimethyl-2lambda5-1,3,2-diazaphosphorin-2-amine2×HCID 67005929N'-((2R,3S)-2-(3-Chloro-4-cyano-2-methylphenylamino)-3-hydroxybutanoyl)-4-(methylsulphonyl)benzohydrazide

Product 1

HCID 442009972-chloro-4-((1R,2S)-2-hydroxy-1-(5-(4-(methylsulfonyl)phenyl)-1,3,4-oxadiazol-2-yl)propylamino)-3-methylbenzonitrileYield 23%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a 500 mL, round-bottomed flask equipped with a magnetic stir bar and septum was added N′-((2R,3S)-2-(3-chloro-4-cyano-2-methylphenyl-amino)-3-hydroxybutanoyl)-4-(methylsulphonyl)benzohydrazide (1.12 mg, 2.4 mmol) followed by a addition of anhydrous THF (250 mL) under an atmosphere of nitrogen. To this was then added tosyl chloride (461 mg, 2.4 mmol) followed by addition of polystyrene bound (2-tert-butylimino-2-diethylamino-1,3-dimethylperhydro-1,3,2-diazaphosphorine (PS-BEMP) (2.2 mmol/g loading, 3.30 g, 7.3 mmol). This mixture was allowed to stir at room temperature for a period of 16 h. The solids were then filtered off and washed with additional THF (100 mL). The filtrate was then concentrated under reduced pressure to reveal a red solid. This was purified via silica gel chromatography eluted with 80% EtOAc/hexanes to yield product as a white solid (247 mg, 23%). 1H NMR (500 MHz, acetone-d6, δ in ppm) 8.23 (AA′XX′, J=8.7 Hz, 2H), 8.12 (AA′XX′, J=8.6 Hz, 2H), 7.47 (d, J=8.7 Hz, 1H), 6.87 (d, J=8.8 Hz, 1H), 5.70 (d, J=8.7 Hz, 1H), 5.17 (dd, J=3.6, 8.5 Hz, 1H), 4.86 (br s, 1H), 4.66 (m, 1H), 3.20 (s, 3H), 2.40 (s, 3H), 1.43 (d, J=6.3 Hz, 3H).

Workup

  1. customTo a 500 mL, round-bottomed flask equipped with a magnetic stir bar
  2. filtrationThe solids were then filtered off
  3. washwashed with additional THF (100 mL)
  4. concentrationThe filtrate was then concentrated under reduced pressure
  5. customThis was purified via silica gel chromatography
  6. washeluted with 80% EtOAc/hexanes

Sources & evidence

ORD record
ord-4a9e1b69870844319c2fc868c1c0e3ce
Source dataset
uspto-grants-2012_09
Patent number
US08268872B2

Reaction notes

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