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An Enyne Cope Rearrangement Enables Polycycloalkane Synthesis from Readily Available Starting Materials
Author(s) -
Scott Sarah K.,
Grenning Alexander J.
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201703186
Subject(s) - propargyl , enyne , electrophile , cope rearrangement , chemistry , adduct , cyclohexanone , knoevenagel condensation , cyclopentenone , organic chemistry , combinatorial chemistry , catalysis
Abstract Cyclohexanone‐derived Knoevenagel adducts (cyclohexylidenemalononitriles) and two different propargyl electrophiles serve as carbon sources for assembling diverse 6/7/5 tricycloalkanes, a common terpenoid framework. The sequence involves three unique reactions: 1) deconjugative propargylation, 2) one‐pot enyne Cope rearrangement/deconjugative propargylation, and 3) an allenic Pauson–Khand reaction.