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. Author manuscript; available in PMC: 2013 Feb 25.
Published in final edited form as: Tetrahedron. 2012 Jan 10;68(8):2027–2040. doi: 10.1016/j.tet.2012.01.005

Figure 4.

Figure 4

Temperature effect on the conformational isomerism of 32 in DMSO–d6. The entire 1H NMR spectrum of 32 was recorded but only the 5.6-3.8 δ range is shown for enhanced clarity. 1H NMR spectra at 293, 313, 333 and 353 K were recorded on a Varian 300 MHz instrument, while the spectrum at 373 K was recorded on a Bruker 400 MHz.