Triethylamine → 2-(4-chloro-3,5-diphenyl-1H-pyrazolo[3,4-c]pyridazin-1-yl)-N-methylacetamide

HRID 1525393Notes

Reaction equation

HRID 1525393 reaction equation
[Cl:1][C:2]1[C:7]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)=[N:6][N:5]=[C:4]2[N:14]([CH2:23][C:24](O)=[O:25])[N:15]=[C:16]([C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[C:3]=12.ClC1C(C2C=CC=CC=2)=N[N:31]=[C:30]2N(C)N=C(C3C=CC=CC=3Cl)C=12.C(CC#N)(=O)C1C=CC=CC=1.Cl.N(CC(OCC)=O)N.C(N(CC)CC)C.OC1C=CC=C[N+]=1[O-].Cl.CN.Cl.CN(C)CCCN=C=NCC.C(N(C(C)C)CC)(C)C>C(Cl)Cl.CN(C=O)C>[Cl:1][C:2]1[C:7]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)=[N:6][N:5]=[C:4]2[N:14]([CH2:23][C:24]([NH:31][CH3:30])=[O:25])[N:15]=[C:16]([C:17]3[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=3)[C:3]=12

Participants

12

Reactant 9

HCID 8471TriethylamineHCID 64799BenzoylacetonitrileHCID 81531DiisopropylethylamineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 6364545Methylamine hydrochlorideHCID 11593468Acetic acid, 2-hydrazinyl-, ethyl ester, hydrochloride (1:1)HCID 665757822-(4-chloro-3,5-diphenyl-1H-pyrazolo[3,4-c]pyridazin-1-yl)acetic acid2×HCID 665764824-chloro-3-(2-chlorophenyl)-1-methyl-5-phenyl-1H-pyrazolo[3,4-c]pyridazineHCID 178526252HCID 178526252, compound

Product 1

HCID 665767222-(4-chloro-3,5-diphenyl-1H-pyrazolo[3,4-c]pyridazin-1-yl)-N-methylacetamide

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

Compound 5 was synthesised from 2-(4-chloro-3,5-diphenyl-1H-pyrazolo[3,4-c]pyridazin-1-yl)acetic acid, which was synthesised following similar procedures outlined in Example 1 (Compound 37), using benzoylacetonitrile instead of 2-chlorobenzoyl acetonitrile and ethyl hydrazinoacetate hydrochloride and 1.5 equivalent of triethylamine instead of methylhydrazine in Step 1. To a suspension of 2-(4-chloro-3,5-diphenyl-1H-pyrazolo[3,4-c]pyridazin-1-yl)acetic acid (73 mg, 0.2 mmol) in CH2Cl2 (1 mL) were added 2-hydroxypyridine-N-oxide (HOPO) (22 mg, 0.2 mmol), methylamine hydrochloride (14 mg, 0.2 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (MAC) (50 mg, 0.25 mmol), diisopropylethylamine (DIPEA) (90 μl, 0.2 mmol) and DMF (0.5 mL). The reaction mixture was stirred at room temperature for 90 min then concentrated in vacuo. The residue was purified by preparative HPLC yielding Compound 5 as an off-white solid (6 mg).

Workup

  1. customwas synthesised
  2. concentrationthen concentrated in vacuo
  3. customThe residue was purified by preparative HPLC

Sources & evidence

ORD record
ord-ae448d03cde9483d974ef623e63f6d95
Source dataset
uspto-grants-2015_07
Patent number
US09079909B2

Reaction notes

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