3-Methoxypropyne → 6-(2,6-Diethyl-phenyl)-4-(3-methoxy-prop-1-ynyl)-2-methyl-nicotinic acid ethyl ester

HRID 251623Notizen

Reaktionsgleichung

[CH2:1]([O:3][C:4](=[O:23])[C:5]1[C:10](Br)=[CH:9][C:8]([C:12]2[C:17]([CH2:18][CH3:19])=[CH:16][CH:15]=[CH:14][C:13]=2[CH2:20][CH3:21])=[N:7][C:6]=1[CH3:22])[CH3:2].[CH2:24]([O:27][CH3:28])[C:25]#[CH:26]>C(NC(C)C)(C)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.[Cu](I)I>[CH2:1]([O:3][C:4](=[O:23])[C:5]1[C:10]([C:26]#[C:25][CH2:24][O:27][CH3:28])=[CH:9][C:8]([C:12]2[C:17]([CH2:18][CH3:19])=[CH:16][CH:15]=[CH:14][C:13]=2[CH2:20][CH3:21])=[N:7][C:6]=1[CH3:22])[CH3:2]

Komponenten

Reaktionsbedingungen

Temperatur: 105 °C

Versuchsvorschrift

A mixture of 4-bromo-6-(2,6-diethyl-phenyl)-2-methyl-nicotinic ethyl ester (308 mg, 0.82 mmol), methyl propargyl ether (0.69 mL, 8.2 mmol), Pd(PPh3)4 (95 mg, 0.082 mmol), and copper iodide (8 mg, 0.041 mmol) in diisopropylamine (8 mL) is heated at 105° C. in a sealed tube. After filtration through celite, the filtrate is concentrated in vacuo and the residue purified by flash chromatography to give 6-(2,6-diethyl-phenyl)-4-(3-methoxy-propyn-1-yl)-2-methyl-nicotinic acid ethyl ester as a yellow oil. 1H NMR (CDCl3) 7.36-7.29 (m, 2H), 7.20-7.15 (m, 2H), 4.47 (q, 2H), 4.32 (s, 2H), 3.41 (s, 3H), 2.62 (s, 3H), 2.38-2.27 (m, 4H), 1.41 (t, 3H), 1.06 (t, 6H).

Aufarbeitung

filtrationAfter filtration through celite
concentrationthe filtrate is concentrated in vacuo
customthe residue purified by flash chromatography

Quellen und Nachweise

ORD-Eintrag: ord-e8b6344efb5347e184583b4edba59183
Quelldatensatz: uspto-grants-2011_01
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US07863454B2

Notizen zur Reaktion

Wird geladen…