Synthesis using 1-lithio 1-seleno alkenes

Synthesis of carbohydrate-based vinyl selenides via Wittig-type reactions

Carbohydrate-based vinyl selenides of the arabino, ribo and 2-deoxy-ribo configuration have been prepared by Wittig-type reactions of various protected furanoses. Moderate yields were always obtained due to the nature and reactivity of both carbohydrate lactols and selenium-based olefinating reagents under the conditions tested. A detailed study of the olefination reaction and the behaviour of vinyl selenides towards the electrophilic-induced cyclization will be discussed.

The Regio- and Stereoselective One-Pot Catalytic Preparation of β-Selenyl Acrylamides

Pd(PPh(3))(4) is found to catalytically assemble sulfenamides, terminal aliphatic alkynes, carbon monoxide, and diphenyl diselenides regio- and stereoselectively in a single-pot reaction to produce good yields of beta-selenyl acrylamides. [reaction: see text]