Double Cycloaddition Reaction of Imidazolium Methylides. Intermolecular 1,3-Dipolar and Intramolecular Diels-Alder Cycloaddition Reactions
نویسندگان
چکیده
منابع مشابه
Formal [2 + 2 + 2] cycloaddition strategy based on an intramolecular propargylic ene reaction/Diels-Alder cycloaddition cascade.
A formal, metal-free, [2 + 2 + 2] cycloaddition strategy is described based on a cascade of two pericyclic processes. The first step involves an intramolecular propargylic ene reaction of a 1,6-diyne to generate a vinylallene, which then reacts in an inter- or intramolecular Diels-Alder reaction with an alkenyl or alkynyl dienophile. Reactions involving unsymmetrical alkenyl and alkynyl dienoph...
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متن کاملDiels-Alder cycloaddition strategy for kinetic resolution of chiral pyrazolidinones.
A rare example of the application of a catalytic, enantioselective Diels-Alder cycloaddition to affect a kinetic resolution has been developed. Chiral pyrazolidinones are resolved with high selectivity through a process that utilizes a relay of stereochemical information from a permanent chiral center to a fluxional chiral center to enhance the inherent selectivity of the chiral Lewis acid cata...
متن کاملThe first intramolecular silene Diels-Alder reactions.
The synthesis of silaheterocycles through the first examples of an intramolecular silene Diels-Alder reaction is described.
متن کاملSynthesis and Diels–Alder cycloaddition reaction of norbornadiene and benzonorbornadiene dimers
Dimeric forms of norbornadiene and benzonorbornadiene were synthesized starting with known monobromide derivatives. The Diels-Alder cycloaddition reaction of dimers with TCNE and PTAD was investigated and new norbornenoid polycyclics were obtained. All compounds were characterized properly using NMR spectroscopy.
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ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1983
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.56.2073