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Cesium carbonate → Methyl 4-(8-(3-(trifluoromethyl)phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-ylamino)benzoate

HRID 1913092
Notes
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Reaction equation

HRID 1913092 reaction equation
[F:1][C:2]([F:20])([F:19])[C:3]1[CH:4]=[C:5]([C:9]2[C:10]3[N:11]([N:15]=[C:16]([NH2:18])[N:17]=3)[CH:12]=[CH:13][CH:14]=2)[CH:6]=[CH:7][CH:8]=1.I[C:22]1[CH:31]=[CH:30][C:25]([C:26]([O:28][CH3:29])=[O:27])=[CH:24][CH:23]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCOCC1.C([O-])(=O)C.[Pd+2].C([O-])(=O)C.CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>[F:20][C:2]([F:19])([F:1])[C:3]1[CH:4]=[C:5]([C:9]2[C:10]3[N:11]([N:15]=[C:16]([NH:18][C:22]4[CH:31]=[CH:30][C:25]([C:26]([O:28][CH3:29])=[O:27])=[CH:24][CH:23]=4)[N:17]=3)[CH:12]=[CH:13][CH:14]=2)[CH:6]=[CH:7][CH:8]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 69273Methyl 4-iodobenzoateHCID 591990748-(3-Trifluoromethylphenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-ylamine

Product 1

HCID 44554495Methyl 4-(8-(3-(trifluoromethyl)phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-ylamino)benzoateYield 72.1%

Reagents, catalysts & solvents 3

HCID 167845
palladium(II) acetate
Catalyst
HCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)Catalyst
HCID 312751,4-DioxaneSolvent

Conditions

Temperature
80 °C

Procedure

A suspension of 8-(3-(trifluoromethyl)phenyl)-[1,2,4]-triazolo[1,5-a]pyridin-2-amine (1.0 g, 3.6 mmol, 1 equiv), methyl 4-iodobenzoate (0.95 g, 3.6 mmol, 1.0 equiv), palladium (II) acetate (0.080 g, 0.36 mmol, 0.10 equiv), cesium carbonate (2.34 g, 7.18 mmol, 2.0 equiv), and Xantphos (0.10 g, 0.17 mmol, 0.047 equiv) in 1,4-dioxane (20 mL) was heated to 80° C. After 16 h, the reaction mixture was concentrated in vacuo, and the resulting residue was diluted with methanol and water. The solid was collected by filtration and rinsed sequentially with water, isopropanol, and hexanes to afford crude methyl 4-(8-(3-(trifluoromethyl)phenyl)[1,2,4]triazolo[1,5-a]pyridin-2-ylamino)benzoate (1.07 g, 72%). LCMS (ESI) m/z: 413.0; 1H NMR (400 MHz, DMSO-d6) δ: 10.29 (s, 1 H), 8.88 (m, 1 H), 8.63 (s, 1 H), 8.40 (m, 1 H), 8.02 (m, 1 H), 7.78-7.90 (m, 6 H), 7.20 (m, 1 H), 3.80 (s, 3 H).

Workup

  1. concentrationthe reaction mixture was concentrated in vacuo
  2. additionthe resulting residue was diluted with methanol and water
  3. filtrationThe solid was collected by filtration
  4. washrinsed sequentially with water, isopropanol, and hexanes

Sources & evidence

ORD record
ord-00b8e696085d4fc892a2776587b15064
Source dataset
uspto-grants-2013_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08609687B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes