4-Cyanobenzohydrazide → HCID 67006530, compound

HRID 563215Notes

Reaction equation

HRID 563215 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 57908671(3-Chloro-4-cyano-2-methylphenyl)-D-threonine2×

Product 1

HCID 67006530HCID 67006530, compoundYield 78.4%

Conditions

Temperature
0 °C

Procedure

(2R,3S)-2-(3-chloro-4-cyano-2-methylphenylamino)-3-hydroxybutanoic acid (intermediate 1a) (10.03 g, 37.3 mmol) and 4-cyano-benzohydrazide (6.02 g, 37.3 mmol) were coupled in an analogous procedure as described for the preparation of intermediate 3b. The crude product was purified by boiling in chloroform (100 mL) followed by cooling to 0° C. and filtration to yield product as a light yellow solid (12.05 g, 78%). 1H NMR (400 MHz, acetone-d6, δ in ppm) 9.81 (br s, 2H), 8.08 (AA′XX′, J=8.6 Hz, 2H), 7.91 (AA′XX′, J=8.7 Hz, 2H), 7.51 (d, J=8.7 Hz, 1H), 6.69 (d, J=8.8 Hz, 1H), 5.57 (d, J=7.0 Hz, 1H), 4.40 (m, 1H), 2.34 (dd, J=3.6, 6.9 Hz, 1H), 2.34 (s, 3H), 1.35 (d, J=6.4 Hz, 3H).

Workup

  1. customThe crude product was purified
  2. filtrationfiltration

Sources & evidence

ORD record
ord-edd2d6bcf4fd4e3e99989d6130d1117d
Source dataset
uspto-grants-2011_11
Patent number
US08067448B2

Reaction notes

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