Morpholine → HCID 66747691, Verbindung

Reaktionsgleichung

Br[C:2]1[S:6][C:5]([C:7]([O:9][CH3:10])=[O:8])=[C:4]([CH3:11])[C:3]=1[C:12]#[N:13].[NH:14]1[CH2:19][CH2:18][O:17][CH2:16][CH2:15]1.C(=O)([O-])[O-].[Cs+].[Cs+]>O1CCCC1>[C:12]([C:3]1[C:4]([CH3:11])=[C:5]([C:7]([O:9][CH3:10])=[O:8])[S:6][C:2]=1[N:14]1[CH2:19][CH2:18][O:17][CH2:16][CH2:15]1)#[N:13]

Komponenten

Versuchsvorschrift

A mixture of methyl 5-bromo-4-cyano-3-methylthiophene-2-carboxylate (6.29 g, 24.2 mmol), morpholine (2.53 g, 29.0 mmol) and cesium carbonate (15.8 g, 48.4 mmol) in anhydrous Tetrahydrofuran (110 mL) was heated to reflux for 19 hours, and then cooled to room temperature. The mixture was filtered and washed with DCM. The filtrate was rotavaped with Celite. The coated Celite was dry loaded in a silica gel cartridge and chromatographed using MeOH/DCM (1/99) to give a white solid product (4.70 g, yield 73%). LC/MS: (FA) ES+ 267. 1H NMR (400 MHz, d-chloroform) δ 3.85 (m, 4H), 3.82 (s, 3H), 3.58 (m, 4H), 2.56 (s, 3H).