A Sakurai−Prins−Ritter Sequence for the Three-Component Diastereoselective Synthesis of 4-Amino Tetrahydropyrans
作者:Oleg L. Epstein、Tomislav Rovis
DOI:10.1021/ja066794k
日期:2006.12.1
A simple one-pot procedure for the Sakurai-Prins-Ritter sequence allows rapid assembly of 4-acylamino-2,6-substituted tetrahydropyrans in high yields and with excellent diastereoselectivity from readily available 4-acetoxy-1,3-dioxanes, allylsilanes, and nitriles. A variety of nitriles have been shown to participate. Diastereoselectivities are uniformly high and observed stereochemistry of cation trapping proceeds according to Alder's model of the 4-tetrahydropyranyl cation.
A Regio- and Stereocontrolled Approach to Pyranosyl <i>C-</i>Nucleoside Synthesis
作者:Philip Redpath、Simon Macdonald、Marie E. Migaud
DOI:10.1021/ol801183e
日期:2008.8.7
novel diastereomerically pure C-nucleosides have been synthesized from nonchiral starting materials, using the ene/intramolecular Sakurai cyclization reaction demonstrating a simple, general, and stereocontrolled approach to pyranosyl C-nucleosides.