The base-mediated cyclization of selected benzyl alkynyl sulfones with aromatic aldehydes: novel synthetic access to aryl-substituted 5,6-dihydro-1,4-oxathiin <i>S,S</i>-dioxides
作者:Lilly U. Ho、Mohanad Gh. Shkoor、M. Selim Hossain、Matthew C. Deen、Dmitriy V. Soldatov、Adrian L. Schwan
DOI:10.1080/17415993.2012.719509
日期:2013.4.1
Based on an unexpected product isolated during the LDA-mediated intramolecular cyclization of a benzyl alkynyl sulfones, a conceptually new cyclization method for the formation of 5,6-dihydro-1,4-oxathiin S,S-dioxides is demonstrated. The reaction affords products with (het)aryl groups at the 5- and 6-positions in 754% yield.[GRAPHICS].