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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

Table 2.

1H NMR-CDCl3 parameters for set of signals that reveal the rotational isomerism in derivative 32.

graphic file with name nihms349319u2.jpg
Protons Chemical Shift (d) Splitting Integration
Ha, Position-3 5.64-5.62 & 4.96-4.94 dd & dd 1
Hb, Position-1 5.02-4.78 dd 1
Hb, Position-1 4.41-4.14 dd 1
Hc, Methylene linker 3.79-3.73 d 2
Hd, Methyl ester 3.54-3.43 d 3
He, Position-4 3.42-3.37 m 1
He, Position-4 2.78-2.72 & 2.55-2.49 dd & dd 1