Dimsyl anion in the monoalkylation of solid-phase alkyl sulfones

Traceless Solid-Phase Organic Synthesis

Traceless solid-phase synthesis represents an ultimate sophisticated synthetic strategy on insoluble supports. Compounds synthesized on solid supports can be released without a trace of the linker that was used to tether the intermediates during the synthesis. Thus, the target products are composed only of the components (atoms, functional groups) inherent to the target core structure. A wide variety of synthetic strategies have been developed to prepare products in a traceless manner, and this review is dedicated to all aspects of traceless solid-phase organic synthesis. Importantly, the synthesis does not need to be carried out on a linker designed for traceless synthesis; most of the synthetic approaches described herein were developed using standard, commercially available linkers (originally devised for solid-phase peptide synthesis). The type of structure prepared in a traceless fashion is not restricted. The individual synthetic approaches are divided into eight sections, each devoted to a different methodology for traceless synthesis. Each section consists of a brief outline of the synthetic strategy followed by a description of individual reported syntheses.

Solid-phase synthesis of acrylamides with polymer-bound 2-sulfonylpropanoic acid

A novel polystyrene-bound 2-sulfonylpropanoic acid has been developed and applied to convenient, traceless synthesis of acrylamides in good yield and purity.

Synthesis of 2-arylcycloalka-2,4-dienones using sulfone-based methodology

Addition of the anion derived from (phenylthiomethyl)phenyl sulfone to a selection of aryl omega-alkenyl ketones gives adducts that via a sequence of Lewis acid catalyzed rearrangement, alpha-allylation, and metathesis give rise to 2-thio-4-cycloalkenones. These in turn give cycloalkadienones upon oxidation and elimination. An attempt to develop a polymer-supported variant fails because of the reversibility of sulfone anion addition.