tert-Butanol → 8-bromo-N-[(2-chloro-5-methoxyphenyl)sulfonyl]-6-(trifluoromethyl)imidazo[1,2-a]pyridine-2-carboxamide

HRID 467824Notes

Reaction equation

HRID 467824 reaction equation
[Br:1][C:2]1[C:3]2[N:4]([CH:12]=[C:13]([C:15]([OH:17])=O)[N:14]=2)[CH:5]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:7]=1.Cl.CN(C)CCCN=C=NCC.C(O)(C)(C)C.[Cl:35][C:36]1[CH:41]=[CH:40][C:39]([O:42][CH3:43])=[CH:38][C:37]=1[S:44]([NH2:47])(=[O:46])=[O:45]>CN(C)C1C=CN=CC=1.ClCCl>[Br:1][C:2]1[C:3]2[N:4]([CH:12]=[C:13]([C:15]([NH:47][S:44]([C:37]3[CH:38]=[C:39]([O:42][CH3:43])[CH:40]=[CH:41][C:36]=3[Cl:35])(=[O:46])=[O:45])=[O:17])[N:14]=2)[CH:5]=[C:6]([C:8]([F:9])([F:10])[F:11])[CH:7]=1

Participants

7

Reactant 4

HCID 6386tert-ButanolHCID 3140422-Chloro-5-methoxybenzene-1-sulfonamideHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 593770278-Bromo-6-(trifluoromethyl)imidazo[1,2-a]pyridine-2-carboxylic acid

Product 1

HCID 498189658-bromo-N-[(2-chloro-5-methoxyphenyl)sulfonyl]-6-(trifluoromethyl)imidazo[1,2-a]pyridine-2-carboxamideYield 78.4%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×

Procedure

To the product of Step A (200 mg, 0.647 mmol) was added a solution of 4-(dimethylamino)pyridine (237 mg, 1.94 mmol) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (309 mg, 1.62 mmol) in a 1:1 mixture of t-butanol (5 mL) and dichloromethane (5 mL). The reaction mixture was stirred for 15 min, 2-chloro-5-methoxybenzenesulfonamide (129 mg, 0.582 mmol) was added, and the reaction mixture was stirred at room temperature overnight. Dichloromethane (200 mL) was then added, the mixture was extracted with 1 N hydrochloric acid (3×100 mL), and the separated organic phases were combined, dried over magnesium sulfate, and concentrated under reduced pressure to afford a solid. The solid was rinsed with diethyl ether to afford 234 mg of the title compound, a compound of the present invention, as a white solid, m.p. 191-192° C. 1H NMR (CDCl3) δ 10.1 (br s, 1H), 8.51 (s, 1H), 8.30 (s, 1H), 7.87 (d, 1H), 7.72 (s, 1H), 7.38 (d, 1H), 7.08 (dd, 1H) 3.91 (s, 3H).

Workup

  1. stirringthe reaction mixture was stirred at room temperature overnight
  2. extractionthe mixture was extracted with 1 N hydrochloric acid (3×100 mL)
  3. dry with materialdried over magnesium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customto afford a solid
  6. washThe solid was rinsed with diethyl ether

Sources & evidence

ORD record
ord-56d6406fa9c84ad296c7052b55395a08
Source dataset
uspto-grants-2014_01
Patent number
US08623890B2

Reaction notes

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