Acetic Anhydride → N-[[4-[2-(3,4-Difluorophenyl)-4-(2-hydroxy-2-methyl-1-propoxy)-2H-pyridazin-3-on-5-yl]phenyl]sulfonyl]acetamide

HRID 891418Notes

Reaction equation

HRID 891418 reaction equation
[F: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>[F: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 102976922-(3,4-difluorophenyl)-4-(2-hydroxy-2-methyl-1-propoxy)-5-[4-(aminosulfonyl)phenyl]-3(2H)-pyridazinone

Product 1

HCID 21933965N-[[4-[2-(3,4-Difluorophenyl)-4-(2-hydroxy-2-methyl-1-propoxy)-2H-pyridazin-3-on-5-yl]phenyl]sulfonyl]acetamide

Reagents, catalysts & solvents 1

HCID 142844-(Dimethylamino)pyridineCatalyst

Procedure

A mixture of 2-(3,4-difluorophenyl)-4-(2-hydroxy-2-methyl-1-propoxy)-5-[4-(aminosulfonyl)phenyl]-3(2H)-pyridazinone (Example 459, 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-79d760931cfb43e6961a533082de6576
Source dataset
uspto-grants-2006_02
Patent number
US07001895B2

Reaction notes

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