Diversity-Oriented Synthesis of Functionalized Diaryl Sulfones by Regioselective [3+3] Cyclizations of 1,3-Bis(siloxy)buta-1,3-dienes with 2-(Arylsulfonyl)-3-ethoxy-2-en-1-ones: Scope and Limitations
with 2-(arylsulfonyl)-3-ethoxy-2-en-1-ones, readily available by reaction of β-keto sulfones with triethyl orthoformate, allows the synthesis of a variety of functionalized diaryl sulfones with very good regioselectivity. arenes - sulfones - cyclizations - regioselectivity - silyl enol ethers