Studies on the diastereoselectivity of samarium(II) iodide mediated reductive carbocyclizations of ω-iodo-α,β-unsaturated esters prepared from 2-deoxy-d-ribose
摘要:
The title compounds were reduced with SmI2 or Bu3SnH to give carbocyclic compounds in good yield. The stereoselectivity of the SmI2 reductive carbocyclizations varies with the reaction conditions, the double bond geometry and with the identity of the hydroxyl protecting groups. Keywords: Alkenyl halides, carbohydrates, cyclisation, samarium and compounds.
Samarium(II) iodide mediated transformations of carbohydrate derived alkenyl iodides
作者:Zhihong Zhou、Sharon M. Bennett
DOI:10.1016/s0040-4039(97)00012-9
日期:1997.2
derived acyclic alkenyl iodides were treated with samarium(II) iodide in THF/MeOH/HMPA at low temperature. Highly functionalized carbocycles are formed if the iodide is tethered to an allylic alcohol, an allylic acetate or an α, β - unsaturated t-butyl ester. The chemoselectivity and diastereoselectively of these transformations vary with the solvent system and with the reaction temperature.
Synthesis of vinylcyclopentanes via samarium(II) mediated tandem reactions
作者:Mounira Bent Sadok Ferjani、Zhihong Zhou、Sharon M. Bennett
DOI:10.1016/j.tet.2004.06.099
日期:2004.9
In the presence of either visible light or HMPA, SMI2 reacts with some carbohydrate derived w-iodoallylic alcohols, and their acetylated derivatives, to give vinylcyclopentanediol and vinylcyclopentanetriol derivatives. (C) 2004 Elsevier Ltd. All rights reserved.