Cesium fluoride → Methyl 4-amino-3-chloro-6-(4-chloro-3-ethoxy-2-fluorophenyl)-5-fluoropicolinate

HRID 333651

Reaktionsgleichung

Reaktionsgleichung von HRID 333651
[NH2:1][C:2]1[C:7]([F:8])=[C:6]([C:9]2[CH:14]=[CH:13][C:12]([Cl:15])=[C:11]([O:16][CH2:17][CH3:18])[C:10]=2[F:19])[N:5]=[C:4]([C:20]([O:22][CH3:23])=[O:21])[C:3]=1[Cl:24].Cl[C:26]1[CH:31]=[CH:30][C:29](B2OC(C)(C)C(C)(C)O2)=[C:28](F)[C:27]=1OCC.NC1C(F)=C(Cl)N=C(C(OC)=O)C=1Cl.[F-].[Cs+].P(C1C=C(S([O-])(=O)=O)C=CC=1)(C1C=C(S([O-])(=O)=O)C=CC=1)C1C=C(S([O-])(=O)=O)C=CC=1.[Na+].[Na+].[Na+]>O.C([O-])(=O)C.[Pd+2].C([O-])(=O)C.O.C(#N)C>[NH2:1][C:2]1[C:7]([F:8])=[C:6]([C:9]2[CH:14]=[CH:13][C:12]([Cl:15])=[C:11]([O:16][CH2:17][CH3:18])[C:10]=2[F:19])[N:5]=[C:4]([C:20]([O:22][CH2:23][C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=2)=[O:21])[C:3]=1[Cl:24].[NH2:1][C:2]1[C:7]([F:8])=[C:6]([C:9]2[CH:14]=[CH:13][C:12]([Cl:15])=[C:11]([O:16][CH2:17][CH3:18])[C:10]=2[F:19])[N:5]=[C:4]([C:20]([O:22][CH3:23])=[O:21])[C:3]=1[Cl:24]

Komponenten

10

Edukt 5

HCID 25953Cesium fluorideHCID 6099338Trisodium 3,3',3''-phosphinetriyltris(benzene-1-sulphonate)HCID 22677265Methyl 4-amino-3,6-dichloro-5-fluoropicolinateHCID 704980672-(4-Chloro-3-ethoxy-2-fluorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneHCID 70498279Methyl 4-amino-3-chloro-6-(4-chloro-3-ethoxy-2-fluorophenyl)-5-fluoropicolinate2×

Produkt 2

HCID 57412075Benzyl 4-amino-3-chloro-6-(4-chloro-3-ethoxy-2-fluorophenyl)-5-fluoropicolinateHCID 70498279Methyl 4-amino-3-chloro-6-(4-chloro-3-ethoxy-2-fluorophenyl)-5-fluoropicolinateAusbeute 63 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 167845palladium(II) acetateKatalysatorHCID 962WaterLösungsmittelHCID 18373917Acetonitrile--water (1/1)Lösungsmittel

Reaktionsbedingungen

Temperatur
150 °C

Versuchsvorschrift

Methyl 4-amino-3-chloro-6-(4-chloro-3-ethoxy-2-fluorophenyl)-5-fluoropicolinate (Compound A). 2-(4-Chloro-3-ethoxy-2-fluorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (500 mg, 1.7 mmol, 1.0 equiv) and methyl 4-amino-3,6-dichloro-5-fluoropicolinate (400 mg, 1.7 mmol, 1.0 equiv) were sequentially added to a 5 mL Biotage microwave vessel, followed by CsF (510 mg, 3.3 mmol, 2.0 equiv), palladium(II) acetate (19 mg, 0.084 mmol, 0.05 equiv), and sodium 3,3′,3″-phosphinetriyltribenzene-sulfonate (95 mg, 0.17 mmol, 0.10 equiv). A 3:1 mixture of water-acetonitrile (3.2 mL) was added, and the resulting brown mixture was heated in a benchtop microwave at 150° C. for 5 min. The cooled reaction mixture was diluted with water (150 mL) and extracted with CH2Cl2 (4×50 mL). The combined organic extracts were dried (MgSO4), gravity filtered, and concentrated by rotary evaporation. The residue was purified by silica gel column chromatography (eluting with 33% EtOAc/hexane) to afford the desired product, methyl 4-amino-3-chloro-6-(4-chloro-3-ethoxy-2-fluorophenyl)-5-fluoropicolinate as a tan powder (450 mg, 63%): mp 170-172° C.; IR (thin film) 3485 (m), 3380 (s), 2951 (w), 1739 (s), 1610 (s) cm−1; 1H NMR (300 MHz, CDCl3) δ 7.20-7.30 (m, 2H), 4.95 (br s, 2H), 4.19 (q, J=7 Hz, 2H), 3.98 (s, 3H), 1.43 (t, J=7 Hz, 3H); ESIMS m/z 377 ([M+H]+).

Aufarbeitung

  1. additionwas added
  2. customThe cooled reaction mixture
  3. extractionextracted with CH2Cl2 (4×50 mL)
  4. dry with materialThe combined organic extracts were dried (MgSO4), gravity
  5. filtrationfiltered
  6. concentrationconcentrated by rotary evaporation
  7. customThe residue was purified by silica gel column chromatography (eluting with 33% EtOAc/hexane)

Quellen und Nachweise

ORD-Eintrag
ord-aab78c61fa114167950b4fc800c9f74a
Quelldatensatz
uspto-grants-2014_11
Patentnummer
US08883688B2

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