Y. Vallee et al., [4-PI-PI] CYCLOADDITIONS OF N-ACYL-THIOFORMAMIDES(2), Phosphorus, sulfur and silicon and the related elements, 120, 1997, pp. 245-258
Thiocarbonyl compounds, such as thioaldehydes and thioketones, are goo
d dienophiles in the Diels-Alder reaction. Here we show that suitably
substituted thioformamides can also be used in this reaction. A theore
tical study of the [4 pi + 2 pi] cycloaddition of thiocarbonyls with b
utadiene has been performed and was used to determine the needed subst
ituents.