Evolution of a Unified, Stereodivergent Approach to the Synthesis of Communesin F and Perophoramidine

Title
Evolution of a Unified, Stereodivergent Approach to the Synthesis of Communesin F and Perophoramidine
Authors
한서정Florian VogtJeremy MayShyam KrishnanMichele GattiScott C. VirgilBrian M. Stoltz
Issue Date
2015-01
Publisher
Journal of organic chemistry
Citation
VOL 80, NO 1-547
Abstract
Expedient synthetic approaches to the highly functionalized polycyclic alkaloids communesin F and perophoramidine are described using a unified approach featuring a key decarboxylative allylic alkylation to access a crucial and highly congested 3,3-disubstituted oxindole. Described are two distinct, stereoselective alkylations that produce structures in divergent diastereomeric series possessing the critical vicinal all-carbon quaternary centers needed for each synthesis. Synthetic studies toward these challenging core structures have revealed a number of unanticipated modes of reactivity inherent to these complex alkaloid scaffolds. Additionally, several novel and interesting intermediates en route to the target natural products, such as an intriguing propellane hexacyclic oxindole encountered in the communesin F sequence, are disclosed. Indeed, such unanticipated structures may prove to be convenient strategic intermediates in future syntheses.
URI
http://pubs.kist.re.kr/handle/201004/67370
ISSN
0022-3263
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KIST Publication > Article
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