Acetic Anhydride → HCID 21934258, compound

HRID 381999Notes

Reaction equation

HRID 381999 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([N:9]2[C:14](=[O:15])[C:13]([O:16][CH2:17][C:18]([OH:21])([CH3:20])[CH3:19])=[C:12]([C:22]3[CH:27]=[CH:26][C:25]([S:28]([NH2:31])(=[O:30])=[O:29])=[CH:24][CH:23]=3)[CH:11]=[N:10]2)[CH:5]=[CH:6][C:7]=1[F:8].[C:32](OC(=O)C)(=[O:34])[CH3:33].C(N(CC)CC)C>CN(C)C1C=CN=CC=1>[Cl:1][C:2]1[CH:3]=[C:4]([N:9]2[C:14](=[O:15])[C:13]([O:16][CH2:17][C:18]([OH:21])([CH3:20])[CH3:19])=[C:12]([C:22]3[CH:27]=[CH:26][C:25]([S:28]([NH:31][C:32](=[O:34])[CH3:33])(=[O:30])=[O:29])=[CH:24][CH:23]=3)[CH:11]=[N:10]2)[CH:5]=[CH:6][C:7]=1[F:8]

Participants

5

Reactant 3

HCID 7918Acetic AnhydrideHCID 8471TriethylamineHCID 10226950HCID 10226950, compound

Product 1

HCID 21934258HCID 21934258, compound

Reagents, catalysts & solvents 1

HCID 142844-(Dimethylamino)pyridineCatalyst

Procedure

A mixture of 2-(3-chloro-4-fluorophenyl)-4-(2-hydroxy-2-methyl-1-propoxy)-5-[4-(aminosulfonyl)phenyl]-3(2H)-pyridazinone (Example 480, 1 equivalent), acetic anhydride (3 equivalents), 4-(dimethylamino)pyridine (0.3 equivalents), and triethylamine (1.2 equivalents) is stirred at room temperature for 16 hours. The reaction mixture is partitioned between ethyl acetate and water. The organic layer is washed with brine then dried over MgSO4 and filtered. The filtrate is concentrated in vacuo to give the title compound.

Workup

  1. customThe reaction mixture is partitioned between ethyl acetate and water
  2. washThe organic layer is washed with brine
  3. dry with materialthen dried over MgSO4
  4. filtrationfiltered
  5. concentrationThe filtrate is concentrated in vacuo

Sources & evidence

ORD record
ord-f846351d8d234b4b9a8ac0b9c923b0b4
Source dataset
uspto-grants-2001_10
Patent number
US06307047B1

Reaction notes

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