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. 2025 Jun 4;21:1104–1115. doi: 10.3762/bjoc.21.88

Table 2.

Overview of the relevant compounds with their chemical shifts δ, multiplicity, coupling constants J and dihedral angles ϕ for both protons H2 and H6 as well as the resulting conformation for the compound.

Product Class
δ (H2)
[ppm]		 3J(H2,H3,pro-S)
3J(H2,H3,pro-R)
[Hz]		 ϕ(H2,H3,pro-S)
ϕ(H2,H3,pro-R)
[°]		 Class
δ (H6)
[ppm]		 3J(H6,H5,pro-S)
3J(H6,H5,pro-R)
[Hz]		 ϕ(H6,H5,pro-S)
ϕ(H6,H5,pro-R)
[°]		 Conf.
(2R,6S)-9 dd
5.03		 5.7
3.6		 300
60		 dd
4.78		 5.1
5.1		 60
300		 chair
(2R,6S)-9 d
4.17		 0
5.8		 90
210		 d
5.81		 5.9
0		 30
270		 half-chair
(2R,6R)-9 dd
5.26		 6.3
2.2		 300
60		 dd
4.71		 11.7
3.3		 180
60		 chair
(2R,6S)-10 dd
4.87		 5.3
5.3		 300
60		 dd
4.75		 7.2
4.4		 60
300		 chair
(2R,6S)-10 d
4.23		 0
5.0		 90
210		 d
5.77		 5.7
0		 30
270		 half-chair
(2R,6S)-11 dd
4.03		 3.3
12.9		 60
180		 dd
4.16		 2.8
12.8		 300
180		 chair
(2R,6S)-13I d
5.11		 4.7
0		 330
90		 d
5.06		 0
6.0		 270
210		 half-chair
(2R,6S)-13II d
4.68		 0
5.8		 90
210		 d
5.39		 4.8
0		 30
270		 half-chair
(2R,6R)-13 dd
4.97		 4.2
4.2		 300
60		 dd
4.64		 10.3
3.3		 180
60		 chair