A Unified Approach to Quinolizinium Cations and Related Systems by Ring-Closing Metathesis.
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2005 Fused pyridine derivatives R 0450 A Unified Approach to Quinolizinium Cations and Related Systems by Ring-Clos- ing Metathesis. — The first example of a RCM process involving heteroaromatic cat- ions and cationic interconversion (azinium to quinolizinium) allows the preparation of a variety of heteroaromatic cations, including dihydroquinolizinium and pyridoiso- quinolinium, -quinolinium, -azepinylium, and -azocinylium. The products are obtained in good overall yield from readily available starting materials. The RCM reaction af- fording higher-membered ring systems is only successful when the reaction is carried out at high dilution (0.005 M). — (NUNEZ, A.; CUADRO*, A. M.; ALVAREZ-BUILLA, J.; VAQUERO*, J. J.; Org. Lett. 6 (2004) 22, 4125-4127; Dep. Quim. Org., Univ. Alcala, E-28871 Alcala de Henares, Madrid, Spain; Eng.) — Steudel 07- 134
Transcript of A Unified Approach to Quinolizinium Cations and Related Systems by Ring-Closing Metathesis.
2005
Fused pyridine derivativesR 0450 A Unified Approach to Quinolizinium Cations and Related Systems by Ring-Clos-
ing Metathesis. — The first example of a RCM process involving heteroaromatic cat-ions and cationic interconversion (azinium to quinolizinium) allows the preparation of a variety of heteroaromatic cations, including dihydroquinolizinium and pyridoiso-quinolinium, -quinolinium, -azepinylium, and -azocinylium. The products are obtained in good overall yield from readily available starting materials. The RCM reaction af-fording higher-membered ring systems is only successful when the reaction is carried out at high dilution (0.005 M). — (NUNEZ, A.; CUADRO*, A. M.; ALVAREZ-BUILLA, J.; VAQUERO*, J. J.; Org. Lett. 6 (2004) 22, 4125-4127; Dep. Quim. Org., Univ. Alcala, E-28871 Alcala de Henares, Madrid, Spain; Eng.) — Steudel
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2005
