Abstract
β-Keto vinylic sulfones, the key building blocks for the synthesis of the title compounds,
were prepared by two different routes. NaBH4 reduction of these compounds afforded β-hydroxy vinylic sulfones which were dehydrated
with acetic anhydride and BF3 ·Et2 O to obtain bis(styryl) sulfones. Alternatively, one-pot synthesis of these bis(styryl)
sulfones was also achieved directly from β-keto vinylic sulfones by treating with
NaBH4 in EtOH followed by refluxing with concentrated HCl.
Key words
β-keto vinylic sulfones - β-hydroxy-(E )-vinylic sulfones - (E ,E )-bis(styryl) sulfones - styrylsulfinate - Knoevenagel condensation
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