The same behavior was observed for compound 6f,where the 1H
NMR spectra of 6f in CDCl3 showed two doublet of doublet (dd) peaks
at δ 3.11 ppm and 3.20 ppm, corresponding to the two diastereotopic
methylene protons Ha and Hb, respectively, as shown in Fig. 2. Ha
showed a doublet of doublet peak caused by couplingwith the germinal
proton Hb with 2J=13.92 Hz, then with the vicinal proton Hc with 3J=
7.32 Hz. Similarly, Hb showed a doublet of doublet peak as a result of
coupling with the germinal proton Ha with 2J = 13.86 Hz, then with
the vicinal proton Hc with 3J = 5.12 Hz. Two singlet peaks at δ
3.88 ppm and 3.91 ppm corresponding to the two methoxy groups
were observed. A quartet peak appeared at δ 4.96 ppm corresponding
to the α-proton. The peaks corresponding to the aromatic protons and
the NH appeared at the expected positions.
The same behavior was observed for compound 6f,where the 1HNMR spectra of 6f in CDCl3 showed two doublet of doublet (dd) peaksat δ 3.11 ppm and 3.20 ppm, corresponding to the two diastereotopicmethylene protons Ha and Hb, respectively, as shown in Fig. 2. Hashowed a doublet of doublet peak caused by couplingwith the germinalproton Hb with 2J=13.92 Hz, then with the vicinal proton Hc with 3J=7.32 Hz. Similarly, Hb showed a doublet of doublet peak as a result ofcoupling with the germinal proton Ha with 2J = 13.86 Hz, then withthe vicinal proton Hc with 3J = 5.12 Hz. Two singlet peaks at δ3.88 ppm and 3.91 ppm corresponding to the two methoxy groupswere observed. A quartet peak appeared at δ 4.96 ppm correspondingto the α-proton. The peaks corresponding to the aromatic protons andthe NH appeared at the expected positions.
การแปล กรุณารอสักครู่..
