Table 3.

Signals of proton 5-H and 7-H in ¹H NMR spectra of products 5a–5c, 6a, 7a–7c, and 8a

Compound	dd 5-H δ/ppm J 6ax,5/J 6eq,5/Hz	dd 7-H δ/ppm J 6ax,7/J 6eq,7/Hz	Compound	dd 5-H δ/ppm J 6ax,5/J 6eq,5/Hz	dd 7-H δ/ppm J 6ax,7/J 6eq,7/Hz
cis-5a	4.00 7.5/5.1	5.38 4.8/2.7	trans-5a	4.11 5.7/5.4	5.17 7.5/2.4
cis-5b	4.02 7.5/5.1	5.38 4.5/2.7	trans-5b	4.12 5.7/5.1	5.17 7.8/2.7
cis-5c	3.76 7.2/4.8	5.41 4.5/2.4	trans-5c	3.81 5.4/4.8	5.08 8.1/2.4
cis-6a	2.88 ddq 6.9/6.9/3.6	5.40 3.3/3.0	trans-6a	2.98 ddq 6.9/6.9/3.9	5.30 8.1/2.7
cis-7a	4.00 7.2/6.3	5.31 5.7/2.7	trans-7a	–	–
cis-7b	3.99 7.5/6.0 4.03 6.9/5.4	5.07 6.0/2.4 5.11 8.4/3.0	trans-7b	4.12 9.3/4.8 4.19 5.4/3.9	5.28 5.7/2.4 5.32 4.2/3.0
cis-7c	3.97 7.2/5.1	–	trans-7c	3.93 11.7/6.6	–
cis-8a	4.13 7.5/5.1	5.42 4.5/2.7	trans-8a	4.20 6.3/6.0	5.24 6.9/2.4