For reviews on spiroketals, see: (a) Kluge, A. F. Heterocycles, Tetrahedron, vol.24, issue.43, pp.1699-1740, 1986. ,
) For selected examples, see : (a), Tetrahedron Lett. Synthesis Org. Lett. Xue, J.; Xin, Z, vol.6, issue.8, pp.2397-2399, 1013. ,
1053-1059 and references therein Step economy: (a) and references therein For a discussion, using cases-study from complex molecules total syntheses, see: (d) Newhouse, and references therein. Redox economy: (c) Burns, pp.40-49, 2002. ,
in Ideas in Chemistry and Molecular Sciences: Advances in Synthetic Chemistry A.; Arends, I.; Hanefeld, U. Green Chemistry and Catalysis; Wiley-VCH: Weinheim, Germany, 2007 and references therein. (14) For selected recent examples, see : (a) Coquerel, and references therein. (13), pp.187-202, 2008. ,
Expeditious Divergent Synthetic Approach to Polycyclic Terpene-Like Molecules, Chemistry - A European Journal, vol.14, issue.7, pp.2048-2051, 2011. ,
DOI : 10.1002/chem.201003261
URL : https://hal.archives-ouvertes.fr/hal-00678235
Chemo- and regioselective synthesis of 2-alkylidenetetrahydrofurans bearing a chiral sulfur atom by domino reactions of sulfoximines, Tetrahedron Letters, vol.47, issue.48, pp.8503-8506, 2006. ,
DOI : 10.1016/j.tetlet.2006.09.142
Acta, (e) Gais, H.-J. Heteroatom Chem, pp.3-11, 1985. ,
For oxa-Michael cyclization with vinyl sulfones (or sulfoxide), see (f), Tetrahedron Lett. J. Org. Chem. J. Org. Chem. Tetrahedron Lett. Tetrahedron Lett, vol.26, issue.27, pp.6301-6304, 1985. ,
For epimerization study and previous syntheses, see: (b) Trapp-1502 and references 10-12 therein. (23) (a) Cubero, I. I, Chem. Eur. J. Carbohyd. Res, vol.64, issue.261, pp.590-591, 1495. ,