HCID 57437182, Verbindung → HCID 57437183, Verbindung
Reaktionsgleichung
[CH3:1][O:2][C:3](=[O:14])[C:4]1[CH:9]=[CH:8][CH:7]=[C:6]([O:10][CH2:11][C:12]#[CH:13])[CH:5]=1>C(N(CC)C1C=CC=CC=1)C.CCOCC>[CH3:1][O:2][C:3]([C:4]1[C:5]2[CH:13]=[CH:12][CH2:11][O:10][C:6]=2[CH:7]=[CH:8][CH:9]=1)=[O:14]Komponenten
4
Reagenzien, Katalysatoren, Lösungsmittel 2
Versuchsvorschrift
A solution of 3-prop-2-ynyloxy-benzoic acid methyl ester (10.5 mmol) in N,N-diethylaniline (20 mL) is heated to reflux for 15 h. The mixture is cooled to RT, diluted with ether and washed with aq. HCl (5%) and brine. The solvents are removed in vacuo and the residue is purified by FC (heptane to heptane/EtOAc 95/5) to give the desired chromene derivative. 1H-NMR (CDCl3): δ=3.91 (s, 3H); 4.80 (bs, 2H); 5.93-5.98 (m, 1H); 6.99 (d, J=8.03 Hz, 1H); 7.16 (t, J=7.66 Hz, 1H); 7.34 (d, J=10.3 Hz, 1H); 7.50 (d, J=7.28 Hz, 1H).