A Sakurai–Prins–Ritter reaction sequence for the diastereoselective synthesis of 4-amidotetrahydropyrans catalyzed by bismuth triflate
摘要:
The synthesis of 4-amidotetrahydropyrans has been achieved by a single-step Sakurai-Prins-Ritter reaction sequence in a domino fashion by the reaction of an aldehyde and allyltrimethylsilane in acetonitrile using Bi(OTf)(3) as catalyst. The present synthesis is highly efficient and diastereoselective. (C) 2008 Elsevier Ltd. All rights reserved.
Molecular Iodine–Catalyzed, One-Pot, Diastereoselective Synthesis of 4-Amido Tetrahydropyrans
作者:Gowravaram Sabitha、M. Bhikshapathi、Sambit Nayak、J. S. Yadav
DOI:10.1080/00397910903422534
日期:2010.12.21
A simple and efficient one-pot synthesis of symmetrical 4-amido tetrahydropyrans via the Sakurai-Prins-Ritter reaction sequence using molecular iodine as catalyst from an aldehyde and allyltrimethylsilane in acetonitrile is described. This new method has the advantage of good to excellent yields (60-98%) and short reaction times (20-150min) at ambient temperature with high diastereoselectivity.