Synthesis 2024; 56(12): 1941-1957
DOI: 10.1055/a-2259-5395
paper

Phosphazene-Catalyzed Regioselective Condensation of Allyl Thioethers with Aldehydes: A Rapid Approach to 1,3-Dienyl Sulfides, -Sulfoxides and -Sulfones

Supasorn Phae-nok
,
,
Pawaret Leowanawat
,
,
This project is funded by the National Research Council of Thailand (NRCT) and Mahidol University (N42A650346) and the Thailand Toray Science Foundation (TTSF). A student scholarship to S.P. from the National Science and Technology Development Agency (NSTDA) and Nakhon Ratchasima Rajabhat University (NRRU) are gratefully acknowledged.


Abstract

The phosphazene-catalyzed regioselective condensation of allyl thioethers with aldehydes is investigated. Upon treatment of allyl thioethers with P4-t-Bu, allyl thioether anions are generated and rapidly react with aromatic aldehydes, leading to 1,3-dienyl sulfides in good yields with high regioselectivity. This finding provides an alternative approach for the preparation of allyl thioether anions in a regioselective manner. In addition, chemoselective transformations of 1,3-dienyl sulfides to provide the corresponding 1,3-dienyl sulfoxides or 1,3-dienyl sulfones are also demonstrated.

Supporting Information



Publication History

Received: 09 January 2024

Accepted after revision: 01 February 2024

Accepted Manuscript online:
01 February 2024

Article published online:
27 February 2024

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