First synthesis of 4-(arylsulfonyl)phenols by regioselective [3+3] cyclocondensations of 1,3-bis(silyloxy)-1,3-butadienes with 2-arylsulfonyl-3-ethoxy-2-en-1-ones
The formal [3+3] cyclization of 1,3-bis(silyloxy)-1,3-butadienes with readily available 2-arylsulfonyl-3ethoxy-2-en-1-ones resulted in regioselective formation of 4-(arylsulfonyl)phenols. (C) 2008 Elsevier Ltd. All rights reserved.
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