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Total Syntheses and Structures of Angular [6]‐ and [7]Phenylene: The First Helical Phenylenes (Heliphenes)
Author(s) -
Han Sangdon,
Bond Andrew D.,
Disch Raymond L.,
Holmes Daniel,
Schulman Jerome M.,
Teat Simon J.,
Vollhardt K. Peter C.,
Whitener Glenn D.
Publication year - 2002
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20020902)41:17<3223::aid-anie3223>3.0.co;2-g
Subject(s) - cycloisomerization , phenylene , cobalt , chemistry , stereochemistry , crystallography , chirality (physics) , molecule , catalysis , polymer chemistry , organic chemistry , physics , polymer , chiral symmetry , quantum mechanics , nambu–jona lasinio model , quark
Two plus two plus two times two : A double cobalt‐catalyzed cycloisomerization was used to convert appropriate hexaynes into hydrocarbons 1 and 2 . Their X‐ray structures reveal pronounced helical topologies, but their barriers to enantiomerization are low compared to those of the helicenes.