Triethylamine → HCID 67006593, compound

HRID 470823Notes

Reaction equation

HRID 470823 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].[Si:19]([O:26][CH2:27][C:28]1[CH:37]=[CH:36][C:31]([C:32]([NH:34][NH2:35])=[O:33])=[CH:30][CH:29]=1)([C:22]([CH3:25])([CH3:24])[CH3:23])([CH3:21])[CH3:20].O.ON1C2C=CC=CC=2N=N1.Cl.CN(C)CCCN=C=NCC.C(N(CC)CC)C>C1COCC1>[Si:19]([O:26][CH2:27][C:28]1[CH:29]=[CH:30][C:31]([C:32]([NH:34][NH:35][C:12](=[O:14])[C@H:11]([NH:10][C:4]2[CH:5]=[CH:6][C:7]([C:8]#[N:9])=[C:2]([Cl:1])[C:3]=2[CH3:18])[C@@H:15]([OH:17])[CH3:16])=[O:33])=[CH:36][CH:37]=1)([C:22]([CH3:25])([CH3:24])[CH3:23])([CH3:21])[CH3:20]

Participants

7

Reactant 5

HCID 8471TriethylamineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 27960291-Hydroxybenzotriazole hydrateHCID 107079144-(Tert-butyldimethylsilyloxy)methylbenzhydrazideHCID 57908671(3-Chloro-4-cyano-2-methylphenyl)-D-threonine

Product 1

HCID 67006593HCID 67006593, compoundYield 98.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
-15 °C

Procedure

(2R,3S)-2-(3-chloro-4-cyano-2-methylphenylamino)-3-hydroxybutanoic acid (3 g, 11.16 mmol), 4-((tert-butyldimethylsilyloxy)methyl)benzohydrazide (3.44 g, 12.28 mmol) and anhydrous THF (250 mL) were placed in a 500 mL round bottomed flask and the mixture was cooled to −15° C. 1-Hydroxybenzotriazole hydrate (1.51 g, 11.16 mmol) was added to the mixture together with N-(3-Dimethylaminopropyl)-N′-ethylcarbodimide HCl (3.21 g, 16.74 mmol) at −15° C. followed by triethylamine (2.33 mL, 16.74 mmol), The reaction mixture was maintained at −15° C. and stirred for 1 h after which, stirring continued overnight while the mixture slowly warmed to room temperature. After 19 h, the mixture was filtered under vacuum and the residue washed with THF (70 mL). The THF solution was concentrated to ca. 20 mL, whereupon EtOAc (100 mL) was added followed by water (50 mL). The phases were partitioned and the organic phase washed with water (30 mL), brine (30 mL) dried (Na2SO4), filtered and concentrated to furnish a light brown solid (5.82 g). This crude product was not chromatographed. 1H NMR (400 MHz, acetone-d6, δ in ppm) 7.82 (d, J=9 Hz, 2H), 7.42 (d, J=8 Hz, 1H), 7.38 (d, J=8 Hz, 2H), 6.58 (d, J=8 Hz, 1H), 5.42 (d, J=8 Hz, 1 H), 4.75 (s, 3H), 4.31-4.22 (m, 1 H), 3.99-3.97 (m, 1H), 2.24 (s, 3 H), 0.82 (s, 9H) and 0.01 (s, 6H).

Workup

  1. temperatureThe reaction mixture was maintained at −15° C.
  2. stirringstirring
  3. waitcontinued overnight while the mixture
  4. temperatureslowly warmed to room temperature
  5. waitAfter 19 h
  6. filtrationthe mixture was filtered under vacuum
  7. washthe residue washed with THF (70 mL)
  8. concentrationThe THF solution was concentrated to ca. 20 mL, whereupon EtOAc (100 mL)
  9. additionwas added
  10. customThe phases were partitioned
  11. washthe organic phase washed with water (30 mL), brine (30 mL)
  12. dry with materialdried (Na2SO4)
  13. filtrationfiltered
  14. concentrationconcentrated

Sources & evidence

ORD record
ord-0347d6f1725e454d88b9c7047f29a3bf
Source dataset
uspto-grants-2014_01
Patent number
US08629167B2

Reaction notes

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