Citric Acid → 3-(3-(Cyclopropanecarboxamido)isoquinolin-7-yl)-4-methylbenzoic acid

HRID 1502255Notes

Reaction equation

HRID 1502255 reaction equation
Br[C:2]1[CH:11]=[C:10]2[C:5]([CH:6]=[C:7]([NH:12][C:13]([CH:15]3[CH2:17][CH2:16]3)=[O:14])[N:8]=[CH:9]2)=[CH:4][CH:3]=1.[CH3:18][C:19]1[CH:27]=[CH:26][C:22]([C:23]([OH:25])=[O:24])=[CH:21][C:20]=1B1OC(C)(C)C(C)(C)O1.C(=O)([O-])[O-].[K+].[K+].O1CCOCC1.O.C(O)(=O)CC(CC(O)=O)(C(O)=O)O>>[CH:15]1([C:13]([NH:12][C:7]2[N:8]=[CH:9][C:10]3[C:5]([CH:6]=2)=[CH:4][CH:3]=[C:2]([C:20]2[CH:21]=[C:22]([CH:26]=[CH:27][C:19]=2[CH3:18])[C:23]([OH:25])=[O:24])[CH:11]=3)=[O:14])[CH2:17][CH2:16]1

Participants

7

Reactant 6

HCID 311Citric AcidHCID 962WaterHCID 11430Potassium CarbonateHCID 312751,4-DioxaneHCID 160860864-Methyl-3-(tetramethyl-1,3,2-dioxaborolan-2-yl)benzoic acidHCID 67974626N-(7-bromoisoquinolin-3-yl)cyclopropanecarboxamide

Product 1

HCID 679746613-(3-(Cyclopropanecarboxamido)isoquinolin-7-yl)-4-methylbenzoic acidYield 93%

Conditions

Temperature
90 °C

Procedure

A mixture of N-(7-bromoisoquinolin-3-yl)cyclopropanecarboxamide (0.3305 g, 1.135 mmol), 4-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoic acid (0.3782 g, 1.443 mmol), potassium carbonate (0.3196 g, 2.312 mmol), and bis(di-tert-butyl(4-dimethylaminophenyephosphine)dichloropalladium(II) (81.9 mg, 0.116 mmol) in 1,4-dioxane (5.0 mL, 64 mmol) and water (0.5 mL, 30 mmol) was heated at 90° C. for 2 hours. The reaction mixture was cooled to room temperature, acidified with 10% aqueous citric acid, and extracted twice with ethyl acetate. The combined organic extracts were reduced in volume under evaporation and the product collected via filtration as a white precipitate and dried under vacuum to yield 365.5 mg (91%) of 3-(3-(cyclopropanecarboxamido)isoquinolin-7-yl)-4-methylbenzoic acid. LCMS (ESI): M+H=347.2; 1H NMR (400 MHz, DMSO-d6) δ 10.90 (s, 1H), 9.19 (s, 1H), 8.50 (s, 1H), 8.04 (s, 1H), 7.93 (d, J=8.6 Hz, 1H), 7.89-7.83 (m, 2H), 7.72 (d, J=8.5 Hz, 1H), 7.45 (d, J=7.7 Hz, 1H), 2.34 (s, 3H), 2.14-2.02 (m, 1H), 0.85 (m, 4H).

Workup

  1. temperatureThe reaction mixture was cooled to room temperature
  2. extractionextracted twice with ethyl acetate
  3. customThe combined organic extracts were reduced in volume under evaporation
  4. filtrationthe product collected via filtration as a white precipitate
  5. customdried under vacuum

Sources & evidence

ORD record
ord-34866a887e3c4dce9d1edf21666619db
Source dataset
uspto-grants-2015_12
Patent number
US09206175B2

Reaction notes

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