4-Cyanobenzohydrazide → N'-((2R,3R)-2-(3-chloro-4-cyano-2-methylphenylamino)-3-hydroxybutanoyl)-4-cyanobenzohydrazide

HRID 470773Notes

Reaction equation

HRID 470773 reaction equation
[Cl:1][C:2]1[C:3]([CH3:18])=[C:4]([NH:10][C@H:11]([C@H:15]([OH:17])[CH3:16])[C:12]([OH:14])=O)[CH:5]=[CH:6][C:7]=1[C:8]#[N:9].[C:19]([C:21]1[CH:30]=[CH:29][C:24]([C:25]([NH:27][NH2:28])=[O:26])=[CH:23][CH:22]=1)#[N:20]>>[Cl:1][C:2]1[C:3]([CH3:18])=[C:4]([NH:10][C@H:11]([C@H:15]([OH:17])[CH3:16])[C:12]([NH:28][NH:27][C:25](=[O:26])[C:24]2[CH:23]=[CH:22][C:21]([C:19]#[N:20])=[CH:30][CH:29]=2)=[O:14])[CH:5]=[CH:6][C:7]=1[C:8]#[N:9]

Participants

3

Reactant 2

HCID 4567324-CyanobenzohydrazideHCID 57908625(2R,3R)-2-(3-chloro-4-cyano-2-methylphenylamino)-3-hydroxybutanoic acid

Product 1

HCID 67006999N'-((2R,3R)-2-(3-chloro-4-cyano-2-methylphenylamino)-3-hydroxybutanoyl)-4-cyanobenzohydrazideYield 58.1%

Conditions

Temperature
0 °C

Procedure

(2R,3R)-2-(3-chloro-4-cyano-2-methylphenylamino)-3-hydroxybutanoic acid (805 mg, 3.0 mmol) and 4-cyano-benzohydrazide (483 mg, 3.0 mmol) were coupled in a procedure analogous to that used for the preparation of inter mediate 3b. The crude product was purified by boiling in chloroform (10 mL) followed by cooling to 0° C. and filtration to yield product as a light yellow solid (718 mg, 50%). 1H NMR (500 MHz, acetone-d6, δ in ppm) 9.85 (br s, 2H), 8.09 (AA′XX′, J=8.2 Hz, 2H), 7.92 (AA′XX′, J=8.6 Hz, 2H), 7.52 (d, J=8.6 Hz, 1H), 6.74 (d, J=8.7 Hz, 1H), 5.60 (d, J=7.3 Hz, 1H), 4.27 (m, 1H), 4.16 (dd, J=5.0, 7.3 Hz, 1H), 2.88 (br s, 1H), 2.34 (s, 3H), 1.39 (d, J=6.4 Hz, 3H).

Workup

  1. customThe crude product was purified
  2. filtrationfiltration

Sources & evidence

ORD record
ord-b67e9c966d26489d9390ab914a6f6743
Source dataset
uspto-grants-2014_01
Patent number
US08629167B2

Reaction notes

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