Triethylamine → Tert-butyl 6-[amino(hydroxyimino)methyl]-4-{[tert-butyl(dimethyl)silyl]oxy}spiro[chroman-2,4'-piperidine]-1'-carboxylate

HRID 1096923Notes

Reaction equation

HRID 1096923 reaction equation
[Si:1]([O:8][CH:9]1[C:30]2[C:25](=[CH:26][CH:27]=[C:28]([C:31]#[N:32])[CH:29]=2)[O:24][C:11]2([CH2:16][CH2:15][N:14]([C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:13][CH2:12]2)[CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].CCN(CC)CC.Cl.[OH:41][NH2:42]>CCO>[NH2:32][C:31](=[N:42][OH:41])[C:28]1[CH:29]=[C:30]2[C:25](=[CH:26][CH:27]=1)[O:24][C:11]1([CH2:16][CH2:15][N:14]([C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:13][CH2:12]1)[CH2:10][CH:9]2[O:8][Si:1]([C:4]([CH3:5])([CH3:6])[CH3:7])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 443297Hydroxyamine hydrochlorideHCID 66649537tert-Butyl 4-{[tert-butyl(dimethyl)silyl]oxy}-6-cyano-spiro[chroman-2,4'-piperidine]-1'-carboxylate

Product 1

HCID 76650868Tert-butyl 6-[amino(hydroxyimino)methyl]-4-{[tert-butyl(dimethyl)silyl]oxy}spiro[chroman-2,4'-piperidine]-1'-carboxylate

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

To a suspension of 18.2 g of tert-butyl 4-{[tert-butyl(dimethyl)silyl]oxy}-6-cyano-spiro[chroman-2,4′-piperidine]-1′-carboxylate in EtOH was added 16.3 mL of Et3N and 8.12 g of hydroxyamine hydrochloride at rt, and the reaction mixture was stirred at 85° C. for 1d. The resultant solution was cooled to rt, and concentrated in reduced pressure. To the residue was added H2O, the resultant white solid was filtered, washed with H2O, and dried in vacuo to give a crude product, which was used in the next step without further purification.

Workup

  1. concentrationconcentrated in reduced pressure
  2. additionTo the residue was added H2O
  3. filtrationthe resultant white solid was filtered
  4. washwashed with H2O
  5. customdried in vacuo

Sources & evidence

ORD record
ord-64cda0284c374f18a05bb803759a541a
Source dataset
uspto-grants-2012_03
Patent number
US08138197B2

Reaction notes

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