A diastereoselective tandem RCM approach to spiropiperidines
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.
A new approach to functionalised spiropiperidines through tandem RCM and nitrogen-directed reactionsElectronic supplementary information available: experimental procedures and data for all new compounds. See http://www.rsc.org/suppdata/cc/b2/b203851j/
作者:Andrew S. Edwards、Robert A. J. Wybrow、Craig Johnstone、Harry Adams、Joseph P. A. Harrity
DOI:10.1039/b203851j
日期:2002.7.1
The synthesis of a functionalized spiropiperidine via a tandem ring closing metathesis strategy is described, furthermore, the regio- and stereoselective functionalization of this compound has been achieved through a novel nitrogen-directed epoxidation reaction.