Synthesis of β-Ketosulfone from Sodium Sulfinate and Aryl Ethyl Ketone/Indanone

Metal-free hydrosulfonylation of α,β-unsaturated ketones: synthesis and application of γ-keto sulfones

γ-Keto sulfones are versatile building blocks and valuable intermediates in organic synthesis and pharmaceutical chemistry. Motivated by their excellent properties, we herein report a green, convenient, metal-free hydrosulfonylation method for a variety of ynones, vinyl ketones, and sodium sulfinates in the absence of stoichiometric oxidants. This operationally simple protocol provides straightforward and practical access to a wide range of γ-keto sulfones with broad functional group tolerance from easily available starting materials. Moreover, the β,γ-unsaturated keto sulfones could further react with 2,3-butadienoate to generate cyclopentenes in phosphine-mediated [3 + 2] cycloaddition.

An Efficient Merging of DBU/Enolate and DBU/Benzyl Bromide Organocycles for the Synthesis of alpha Benzylated1-Indanone Derivatives

The merging of dual organocycles of the bicyclic amidine base 1,8-diazabicyclo[5.4.0]undec-7-en (DBU) was demonstrated for the synthesis of alpha benzylated 1-indanones. A highly reactive enolate intermediate was formed in the...