Tetrahedron

A novel tandem [4++ 2] cycloaddition–elimination reaction: 2-alkenyl-4, 4-dimethyl-1, 3-oxathianes as synthetic equivalents for α, β-unsaturated thioaldehydes

S Ohsugi, K Nishide, M Node

Index: Ohsugi, Shin-Ichi; Nishide, Kiyoharu; Node, Manabu Tetrahedron, 2003 , vol. 59, # 11 p. 1859 - 1871

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Citation Number: 15

Abstract

The first tandem cationic [4++ 2] polar cycloaddition–elimination reaction of 1-thia-1, 3- butadienyl cations B with olefins to afford directly 3, 4-dihydro-2H-thiopyrans D is described. The cations B were easily accessible by treatment of monothioacetals A, particularly the 2- ...