Pyridine → HCID 69311531, compound

HRID 2250627Notes

Reaction equation

HRID 2250627 reaction equation
[NH2:1][CH2:2][C:3]1[C:4]([CH2:21][CH2:22][CH2:23][CH2:24][C:25]([O:27][CH2:28][CH3:29])=[O:26])=[C:5]([C:14]2[CH:15]=[N:16][CH:17]=[C:18]([CH3:20])[CH:19]=2)[C:6]2[N:7]([C:9]([CH2:12][CH3:13])=[CH:10][CH:11]=2)[N:8]=1.N1C=CC=CC=1.[CH3:36][S:37](Cl)(=[O:39])=[O:38]>ClCCl.C(Cl)(Cl)Cl>[CH2:12]([C:9]1[N:7]2[N:8]=[C:3]([CH2:2][NH:1][S:37]([CH3:36])(=[O:39])=[O:38])[C:4]([CH2:21][CH2:22][CH2:23][CH2:24][C:25]([O:27][CH2:28][CH3:29])=[O:26])=[C:5]([C:14]3[CH:15]=[N:16][CH:17]=[C:18]([CH3:20])[CH:19]=3)[C:6]2=[CH:11][CH:10]=1)[CH3:13]

Participants

6

Reactant 3

HCID 1049PyridineHCID 31297Methanesulfonyl chlorideHCID 69311575HCID 69311575, compound

Product 1

HCID 69311531HCID 69311531, compoundYield 65.5%

Reagents, catalysts & solvents 2

HCID 6212ChloroformSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of ethyl 5-[2-(aminomethyl)-7-ethyl-4-(5-methyl-3-pyridinyl)pyrrolo[1,2-b]pyridazin-3-yl]pentanoate (80 mg) and pyridine (1 mL) in dichloromethane (2 mL) was added methanesulfonyl chloride (34.8 mg) under ice-water cooling and the mixture was stirred at ambient temperature for 1 hour. The solution was diluted with chloroform, washed with saturated sodium bicarbonate solution and brine, dried over magnesium sulfate, and evaporated in vacuo. The residue was purified by preparative silica gel column chromatography eluting with a mixture of chloroform and methanol (20:1) to give ethyl 5-(7-ethyl-4-(5-methyl-3-pyridinyl)-2-{[(methylsulfonyl)amino]methyl}pyrrolo[1,2-b]pyridazin-3-yl)pentanoate as yellow oil (62.8 mg)

Workup

  1. washwashed with saturated sodium bicarbonate solution and brine
  2. dry with materialdried over magnesium sulfate
  3. customevaporated in vacuo
  4. customThe residue was purified by preparative silica gel column chromatography
  5. washeluting with a mixture of chloroform and methanol (20:1)

Sources & evidence

ORD record
ord-6eb0a922ad904293827e6f3a16c9cd25
Source dataset
uspto-grants-2008_01
Patent number
US07317009B2

Reaction notes

Loading…