Reaction of C3 and C4 ketoses with alkenals and alkenones in water

Autor: Yoshihiro Shigemasa, Minoru Morimoto, Tomoyuki Onitsuka, Hiroyuki Saimoto, Hironobu Motobe, Satoko Okabe, Yoshimori Takamori
Rok vydání: 2004
Předmět:
Zdroj: Tetrahedron Letters. 45:8777-8780
ISSN: 0040-4039
DOI: 10.1016/j.tetlet.2004.10.004
Popis: Treatment of 1,3-dihydroxyacetone and acrolein with aqueous KOH gave a tetrahydrofuran derivative, 1,4-dihydroxy-3,7-dioxabicyclo[3.3.0]octane, in 80% yield. Similarly, 6-alkyl substituted 1,4-dihydroxy-3,7-dioxabicyclo[3.3.0]octanes were obtained by reaction of 1,3-dihydroxyacetone with various α,β-unsaturated aldehydes. In the cases of long chain alkenals, the reaction was effectively accelerated in the presence of organic co-solvent. On the other hand, the corresponding tricyclic products were synthesized by reaction of 1,3-dihydroxyacetone with cyclic enones, such as 2-cyclopentenone and 2-cyclohexenone. This method was successfully applied to the reaction of a tetrulose in the absence of any protecting groups.
Databáze: OpenAIRE