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Synthesis of Donor—Acceptor Alkynylcyclopropanes by Diastereoselective Cyclopropanation of Electron-Deficient Alkenes with Alkoxyalkynyl Fischer Carbene Complexes.

✍ Scribed by Jose Barluenga; Manuel A. Fernandez-Rodriguez; Patricia Garcia-Garcia; Enrique Aguilar; Isabel Merino

Publisher
John Wiley and Sons
Year
2006
Weight
23 KB
Volume
37
Category
Article
ISSN
0931-7597

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✦ Synopsis

Abstract

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Synthesis of Donor–Acceptor Alkynylcyclo
Synthesis of Donor–Acceptor Alkynylcyclopropanes by Diastereoselective Cyclopropanation of Electron-Deficient Alkenes with Alkoxyalkynyl Fischer Carbene Complexes
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## Abstract The reaction of electron‐deficient alkenes with alkoxyalkynyl Fischer carbene complexes (FCCs) represents a straightforward route to a new type of captodative (donor–acceptor) alkynylcyclopropanes, which have been prepared in moderate to high yields and in a diastereoselective manner. S

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Synthesis of Indolizines and Benzoindolizines by Annulation of Donor-Acceptor Cyclopropanes with Electron-Deficient Pyridines and Quinolines
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## Abstract The formal [3+2] dipolar cycloaddition (or annulation) of donor‐acceptor cyclopropanoate esters with pyridines and 5‐nitroquinoline is reported. Electron‐deficient pyridine dipolarophiles (R=CN, CO~2~Et, COMe) participate in the annulation whereas electron rich species do not. The produ