SO4 2-/SnO2-Catalyzed efficient one-pot synthesis of 7,8-Dihydro-2H-Chromen-5-ones by formal [3+3] cycloaddition and 1,8-Dioxooctahydroxanthenes via a Knoevenagel condensation

Original Article

JOURNAL 3287

Organic Communications

VOLUME & ISSUE

Year: 2013 Issue: 3 July-September

PAGES

p.110 - 119

STATISTICS

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AUTHORS

Venugopala R. Narayana, Zubaidha Pudukulathan and Ravi Varala

GRAPHICAL ABSTRACT

ABSTRACT

SO42-/SnO2-Catalyzed efficient one-pot synthesis of 7,8-dihydro-2H-chromen-5-ones by formal [3+3]
cycloaddition and 1,8-dioxo-octahydroxanthenes via a Knoevenagel condensation is described with good yields
under mild reaction conditions. The catalyst could be reused several times without loosing its catalytic
efficiency.

KEYWORDS

cat. SO4 2-/SnO2
α
β-unsaturated aldehydes
cyclic 1
3-diketones
Knoevenagel condensation
reusability