Stereocontrolled formation of substituted imidazolidines in the reaction between N-metalated azomethine ylides and isocyanates
نویسندگان
چکیده
منابع مشابه
The Bonding Situation in Metalated Ylides
Quantum chemical calculations have been carried out to study the electronic structure of metalated ylides particularly in comparison to their neutral analogues, the bisylides. A series of compounds of the general composition Ph3 P-C-L with L being either a neutral or an anionic ligand were analyzed and the impact of the nature of the substituent L and the total charge on the electronics and bon...
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15 صفحه اولUnstabilized azomethine ylides for the stereoselective synthesis of substituted piperidines, tropanes, and azabicyclo[3.1.0] systems.
Acid treatment of densely substituted 2-silyl-1,2-dihydropyridines provides a new and convenient entry to reactive azomethine ylides that can (1) be protonated and reduced with high stereoselectivity to give piperidines, (2) participate in [3 + 2] dipolar cycloaddition to give tropanes, and (3) undergo a Nazarov-like 6-π electrocyclization that upon reduction give 2-azabicyclo[3.1.0] systems.
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ژورنال
عنوان ژورنال: Arkivoc
سال: 2005
ISSN: 1551-7012
DOI: 10.3998/ark.5550190.0006.919