30
Helvetica Chimica Acta – Vol. 90 (2007)
1
[a]2D5 =ꢀ247 (c=0.61, MeOH) [1]). H-NMR (D2O, 400 MHz, 258; d(HOD) 4.79): 3.44–3.50 (m, Hꢀ
2
3
C(4’), HꢀC(5’)); 3.51–3.57 (m, HꢀC(2’), HꢀC(3’)); 3.75 (dd, J=12.1, J=7.1, 1 H of CH2(6’)); 3.92
2
3
(br. d, J=12.1, 1 H of CH2(6’)); 4.29–4.33 (m, Hꢀ(5)); 4.50–4.54 (m, HꢀC(4)); 4.75 (br. d, J=7.3,
3
HꢀC(1’)); 4.97–5.01 (m, HꢀC(6)); 5.66 (br. s, C=CHCN); 6.07 (dd, J=10.1, 2.0, HꢀC(3)); 6.36 (dd,
3J=10.1, J=2.0, HꢀC(2)). 13C-NMR (D2O, 100 MHz): 61.46 (C(6’)); 68.30 (C(4)); 70.00 (C(5)); 70.38
4
(C(5’)); 73.40 (C(2’)); 76.50 (C(4’)); 76.69 (C(6)), 76.90 (C(3’)); 97.74 (C=CHCN); 101.04 (C(1’));
118.63 (CN); 128.13 (C(2)), 136.92 (C(3)), 155.48 (C(1)).
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Received August 23, 2006