Acetic Anhydride → HCID 18630099, compound

HRID 725539Notes

Reaction equation

HRID 725539 reaction equation
[Cl:1][C:2]1[C:12]([CH:13]=O)=[CH:11][CH:10]=[C:9]([Si:15]([CH3:18])([CH3:17])[CH3:16])[C:3]=1[C:4]([NH:6][CH2:7][CH3:8])=[O:5].Cl.[NH2:20]O.C(OC(=O)C)(=O)C>N1C=CC=CC=1>[Cl:1][C:2]1[C:12]([C:13]#[N:20])=[CH:11][CH:10]=[C:9]([Si:15]([CH3:18])([CH3:17])[CH3:16])[C:3]=1[C:4]([NH:6][CH2:7][CH3:8])=[O:5]

Participants

5

Reactant 3

HCID 7918Acetic AnhydrideHCID 443297Hydroxyamine hydrochlorideHCID 10660666HCID 10660666, compound

Product 1

HCID 18630099HCID 18630099, compound

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Conditions

Temperature
100 °C

Procedure

A solution of the compound of Example 223 (0.28 g, 1.0 mmol) and hydroxylamine hydrochloride (0.12 g, 1.7 mmol) in pyridine (10 mL) was stirred at RT for 2 h. Acetic anhydride (0.75 mL, 8.0 mmol) was added and the solution was heated at 100° C. for 1.5 h. The mixture was concentrated, water added and the mixture extracted with ether. The organic layers were washed with 0.5N HCl, sat NaHCO3, brine, dried (MgSO4) and concentrated to afford the title compound. The crude product was purified by recrystallization from ethyl acetate/hexanes to afford 0.21 g of white needles (74%). m.p. 111°-112° C.

Workup

  1. concentrationThe mixture was concentrated
  2. additionwater added
  3. extractionthe mixture extracted with ether
  4. washThe organic layers were washed with 0.5N HCl
  5. dry with materialdried (MgSO4)
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-4441eb1bcbc040fa841fbfbb67c255bb
Source dataset
uspto-grants-1998_01
Patent number
US05705513

Reaction notes

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