Showing papers by "Dante Macciantelli published in 1988"
TL;DR: In this article, les substituants electrodonneurs et electroattracteurs en position 4 augmentent et diminuent respectivement la barrière d'interconversion des napthyl-1 amines tertiaires.
Abstract: Mesure des barrieres d'interconversion entre les deux conformeres enantiomeres de torsion par spectrometre RMN 1 H et 13 C. On montre que les substituants electrodonneurs et electroattracteurs en position 4 augmentent et diminuent respectivement la barriere d'interconversion des napthyl-1 amines tertiaires
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TL;DR: Trimethylsilylphenyl- and triphenylsily lphenyl thioketones easily undergo cycloadditions with cyclic and open chain 1,3-dienes at room temperature to give silylated thiabicyclo[2.2.1 ]heptenes and dihydrothiopyrans in very good yields as mentioned in this paper.
Abstract: Trimethylsilylphenyl- and triphenylsilylphenyl thioketones easily undergo [4 + 2]-cycloadditions with cyclic and open chain 1,3-dienes at room temperature to give silylated thiabicyclo[2.2.1 ]heptenes and dihydrothiopyrans in very good yields. With cyclopentadiene the reaction produces exclusively the endo-silylated adducts. Sulphur oxidation and desilylation of the adducts were also investigated.