Formaldehyde → HCID 58204287, compound

HRID 1498578Notes

Reaction equation

HRID 1498578 reaction equation
[C:1]([O:5][C:6](=[O:32])[C@@H:7]([NH:9][C:10]1[CH:31]=[CH:30][C:13]2[C:14]3[N:18]([CH2:19][CH2:20][O:21][C:12]=2[CH:11]=1)[CH:17]=[C:16]([C:22]1[N:23]([CH:27]([CH3:29])[CH3:28])[N:24]=[CH:25][N:26]=1)[N:15]=3)[CH3:8])([CH3:4])([CH3:3])[CH3:2].C=O.[C:35](O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl>[C:1]([O:5][C:6](=[O:32])[C@@H:7]([N:9]([C:10]1[CH:31]=[CH:30][C:13]2[C:14]3[N:18]([CH2:19][CH2:20][O:21][C:12]=2[CH:11]=1)[CH:17]=[C:16]([C:22]1[N:23]([CH:27]([CH3:28])[CH3:29])[N:24]=[CH:25][N:26]=1)[N:15]=3)[CH3:35])[CH3:8])([CH3:3])([CH3:2])[CH3:4]

Participants

5

Reactant 3

HCID 712FormaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 67050799HCID 67050799, compound

Product 1

HCID 58204287HCID 58204287, compoundYield 97%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

To a solution of (S)-2-[2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-ylamino]-propionic acid tert-butyl ester (0.24 g, 0.55 mmol) in DCE (7 mL) was added aqueous formaldehyde (4.4 mL, 55.4 mmol, 37% solution) and sodium triacetoxyborohydride (7.2 g, 34.0 mmol) portion wise over 58 h. The resulting mixture was then washed with saturated aqueous sodium carbonate and the aqueous phase extracted with further DCM. The combined organic phases were dried (Na2SO4) and concentrated in vacuo to give (S)-2-{[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]-methyl-amino}-propionic acid tert-butyl ester (0.24 g, 97%). LCMS: RT=3.81 min, [M+H]+=453.

Workup

  1. washThe resulting mixture was then washed with saturated aqueous sodium carbonate
  2. extractionthe aqueous phase extracted with further DCM
  3. dry with materialThe combined organic phases were dried (Na2SO4)
  4. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-b0a190cf198f465091a32716639963b8
Source dataset
uspto-grants-2015_12
Patent number
US09198918B2

Reaction notes

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