1. Evans, P. A.; Holmes, A. B. Tetrahedron 1991, 47, 9131–9166.
2. For previous related approaches, see: Lallemand, M.-C.; Chiadmi, M.; Tomas, A.; Kunesch, N.; Husson, H.-P. Tetrahedron Lett. 1995, 36, 2053–-2056, and references cited therein.
3. Gil, L.; Gateau-Olesker, A.; Marazano, C.; Das, B. C. Tetrahedron Lett. 1995, 36, 707–710.
4. Grierson, D. S.; Harris, M.; Husson, H. P. J. Am. Chem. Soc. 1980, 102, 1064–1082.
5. Selected data for 7: mp 112°C (ether–heptane); IR (cm−1) 2981, 2931, 1685, 1605, 1577, 1453, 1421, 1364, 1291, 1251, 1196; 1H NMR (CDCl3, 200 MHz) δ 1.03 (1H, m), 1.29 (3H, t, J=7.1 Hz), 1.57 (1H, tt, J=12.6, 5 Hz), 1.64 (3H, d, J=1.6, 1.8 Hz), 2.85 (1H, m), 3.24 (3H, s), 3.60 (1H, m), 4.00–4.40 (3H, m), 4.20 (2H, q, J=7.1 Hz), 6.28 (1H, m), 7.23–7.40 (5H, m), 7.61 (1H, s); 13C NMR (CDCl3, 50.32 MHz) δ 14.74, 16.82, 21.12, 44.98, 57.07, 59.82, 61.51, 79.21, 95.26, 122.39, 127.78, 128.18, 128.93, 131.33, 136.61, 148.99, 169.88; HRMS calcd for C19H25NO3: 315.1835; found: 315.1842; anal. calcd for C19H25NO3: C, 72.35; H, 7.99; N, 4.44; O, 15.22; found: C, 72.07; H, 8.24; N, 4.53; O, 15.03.