The formation of oxygen-containing heterocycles via intramolecular cyclizations of halo-substituted acylsilanes and unsaturated acylsilanes

[摘要] Halo-substituted acylsilanes undergo cyclizations easily when heated in a polar solvent such as NMP to afford 2-silyldihydrofurans and 2-silyldihydropyrans. Unsaturated acylsilanes undergo cyclizations through reactions with iodine, phenylselenenyl bromide, or chloride. Further reactions of the cyclized products with pyridinium perbromide, phenylselenenyl bromide, or chloride give highly functionalized dihydrofurans and dihydropyrans. (C) 1999 Elsevier Science Ltd. All rights reserved.

[发布日期] 1999-12-17

[关键词] cyclization;furans;pyrans;silicon and compounds