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 381998Notes

Reaction equation

HRID 381998 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-0a86d1adbf8948fe9a30d6a8bcf4ed56
Source dataset
uspto-grants-2001_10
Patent number
US06307047B1

Reaction notes

Loading…