2007

Pyran derivativesR 0340 SmI2-Induced Reductive Cyclization of (E)- and (Z)-β-Alkoxyvinyl Sulfones with

Aldehyde. — The process proceeds stereoselectively to give tetrahydropyran skeletons present in many marine toxins. The conversion of a sulfonylmethyl group to methyl by reduction with Raney-Ni is also demonstrated. — (KIMURA, T.; NAKATA*, T.; Tetrahedron Lett. 48 (2007) 1, 43-46; Dep. Chem., Fac. Sci., Sci. Univ. Tokyo, Shinjuku, Tokyo 162, Japan; Eng.) — Mais

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