作者:Robert A.J. Wybrow、Andrew S. Edwards、Neil G. Stevenson、Harry Adams、Craig Johnstone、Joseph P.A. Harrity
DOI:10.1016/j.tet.2004.07.025
日期:2004.9
This paper outlines the stereocontrolled synthesis of a functionalised spiropiperidine through a diastereoselective tandem RCM reaction. The diastereoselectivity of this process was found to be strongly dependant on the nature of the catalyst; the less active first generation Ru-carbene complexes provided the desired spirocycle in high yield and with good stereocontrol. Additionally, the further functionalisation of the spiropiperidine was carried out through a regio- and stereoselective dihydroxylation reaction employing Donohoe's OsO4-TMEDA conditions. (C) 2004 Elsevier Ltd. All rights reserved.