2,6-Di-tert-butyl-4-methylpyridine → 4-(3-Chlorophenyl)-7-ethyl-3-(5-methoxypentyl)-2-phenylpyrrolo[1,2-b]pyridazine

HRID 2250609Notes

Reaction equation

HRID 2250609 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[C:9]3[N:10]([C:26]([CH2:29][CH3:30])=[CH:27][CH:28]=3)[N:11]=[C:12]([C:20]3[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=3)[C:13]=2[CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][OH:19])[CH:5]=[CH:6][CH:7]=1.F[B-](F)(F)F.[CH3:36][O+](C)C.C(C1C=C(C)C=C(C(C)(C)C)N=1)(C)(C)C>ClCCCl>[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[C:9]3[N:10]([C:26]([CH2:29][CH3:30])=[CH:27][CH:28]=3)[N:11]=[C:12]([C:20]3[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=3)[C:13]=2[CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][O:19][CH3:36])[CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 988982,6-Di-tert-butyl-4-methylpyridineHCID 2735153Oxonium, trimethyl-, tetrafluoroborate(1-) (1:1)HCID 693088395-[4-(3-Chlorophenyl)-7-ethyl-2-phenylpyrrolo[1,2-b]pyridazin-3-yl]-1-pentanol

Product 1

HCID 693117044-(3-Chlorophenyl)-7-ethyl-3-(5-methoxypentyl)-2-phenylpyrrolo[1,2-b]pyridazineYield 89.3%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

A mixture of 5-[4-(3-chlorophenyl)-7-ethyl-2-phenylpyrrolo[1,2-b]pyridazin-3-yl]-1-pentanol (65 mg), trimethyloxonium tetrafluoroborate (27.5 mg) and 2,6-di-t-butyl-4-methylpyridine (47.8 mg) in 1,2-dichloroethane (3 mL) was stirred at ambient temperature for 4 hours. The solution was washed with water, 1N hydrochloric acid, water, saturated sodium bicarbonate solution and brine, dried over magnesium sulfate, and evaporated in vacuo. The residue was purified by silica gel column chromatography eluting with a mixture of hexane and ethyl acetate (20:1-5:1) to give 4-(3-chlorophenyl)-7-ethyl-3-(5-methoxypentyl)-2-phenylpyrrolo[1,2-b]pyridazine as an yellow oil (60 mg).

Workup

  1. washThe solution was washed with water, 1N hydrochloric acid, water, saturated sodium bicarbonate solution and brine
  2. dry with materialdried over magnesium sulfate
  3. customevaporated in vacuo
  4. customThe residue was purified by silica gel column chromatography
  5. washeluting with a mixture of hexane and ethyl acetate (20:1-5:1)

Sources & evidence

ORD record
ord-5e49aeb15a944d04ab493e4aef218c85
Source dataset
uspto-grants-2008_01
Patent number
US07317009B2

Reaction notes

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