Dichloromethane → Ethyl 6-(benzenesulphonylmethyl)-3-cyclopropyl-2-methoxybenzoate

HRID 2177708Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2177708
[C:1]1([S:7]([CH2:10][C:11]2[C:16]([C:17]([O:19][CH2:20][CH3:21])=[O:18])=[C:15]([O:22][CH3:23])[C:14](Br)=[CH:13][CH:12]=2)(=[O:9])=[O:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.O.[CH:26]1(B(O)O)[CH2:28][CH2:27]1.C(Cl)Cl.C(=O)([O-])[O-].[Cs+].[Cs+]>C1COCC1.O>[C:1]1([S:7]([CH2:10][C:11]2[C:16]([C:17]([O:19][CH2:20][CH3:21])=[O:18])=[C:15]([O:22][CH3:23])[C:14]([CH:26]3[CH2:28][CH2:27]3)=[CH:13][CH:12]=2)(=[O:9])=[O:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Komponenten

7

Edukt 4

HCID 6344DichloromethaneHCID 10796Cesium carbonateHCID 66762321Cyclopropylboronic acid monohydrateHCID 67107394Ethyl 6-(benzenesulphonylmethyl)-3-bromo-2-methoxybenzoate2×

Produkt 1

HCID 67107983Ethyl 6-(benzenesulphonylmethyl)-3-cyclopropyl-2-methoxybenzoateAusbeute 59,6 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
140 °C

Versuchsvorschrift

A mixture of ethyl 6-(benzenesulphonylmethyl)-3-bromo-2-methoxybenzoate (Intermediate 61, 0.347 g), cyclopropyl boronic acid monohydrate (0.087 g), palladium chloride dppf adduct with DCM (0.07 g) and cesium carbonate (0.8 g) in THF (9 ml) and water (1 ml) was sealed in a microwave vial and degassed. The mixture was then heated in the microwave at 140° C. for 15 minutes. After cooling, the mixture was dried (MgSO4) and filtered through Celite. The filtrate was evaporated to dryness and the residue was purified by chromatography on silica, eluting with a mixture of t-butyl methyl ether and cyclohexane with a gradient from 0-60% to give ethyl 6-(benzenesulphonylmethyl)-3-cyclopropyl-2-methoxybenzoate (0.187 g) as a gum.

Aufarbeitung

  1. customwas sealed in a microwave vial and
  2. customdegassed
  3. temperatureAfter cooling
  4. dry with materialthe mixture was dried (MgSO4)
  5. filtrationfiltered through Celite
  6. customThe filtrate was evaporated to dryness
  7. customthe residue was purified by chromatography on silica
  8. washeluting with a mixture of t-butyl methyl ether and cyclohexane with a gradient from 0-60%

Quellen und Nachweise

ORD-Eintrag
ord-b7404bc897aa4ef1a3572ee1afd28f7c
Quelldatensatz
uspto-grants-2015_06
Patentnummer
US09067905B2

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