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Cover Feature: Ruthenium‐Catalyzed Cycloisomerization of 2‐Alkynylstyrenes via 1,2‐Carbon Migration That Leads to Substituted Naphthalenes (Chem. Eur. J. 45/2018)
Author(s) -
Watanabe Takuma,
Abe Haruka,
Mutoh Yuichiro,
Saito Shinichi
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201803780
Subject(s) - cycloisomerization , ruthenium , alkyne , chemistry , catalysis , carbon fibers , styrene , medicinal chemistry , stereochemistry , photochemistry , organic chemistry , materials science , polymer , composite number , copolymer , composite material
Catalytic processes that involve internal alkyne‐to‐vinylidene rearrangement of internal alkynes by 1,2‐carbon migration and a subsequent carbon–carbon bond formation have not yet been reported. The simple ruthenium complex [CpRu(dppe)] + catalyzes the cycloaromatization of 2‐alkynylstyrenes via 1,2‐carbon migration, which leads to various di‐ and trisubstituted naphthalenes. The disubstituted vinylidene complex that is derived directly from the 2‐(phenylethynyl)styrene and [CpRu(dppe)] + is the isolable and key intermediate in this cycloisomerization. More information can be found in the Communication by Y. Mutoh, S. Saito, et al. on page 11545.