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Cover Feature: Rhodium‐Catalyzed Cascade Synthesis of Benzofuranylmethylidene‐Benzoxasiloles: Elucidating Reaction Mechanism and Efficient Solid‐State Fluorescence (Chem. Eur. J. 28/2018)
Author(s) -
Namba Tomoya,
Hayashi Yoshihiro,
Kawauchi Susumu,
Shibata Yu,
Tanaka Ken
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.201801511
Subject(s) - rhodium , fluorescence , cationic polymerization , cascade , chemistry , cycloisomerization , photochemistry , dimer , silicon , catalysis , derivative (finance) , silanes , silane , polymer chemistry , organic chemistry , physics , optics , chromatography , financial economics , economics
A cationic rhodium(I)/binap complex was able to catalyze the cascade cycloisomerization of bis(2‐ethynylphenol)silanes involving 1,2‐silicon and 1,3‐carbon migrations followed by oxycyclization to give benzofuranylmethylidene‐benzoxasiloles. Among the obtained products, the 4‐methylphenoxy derivative was thermally stable and exhibited a strong narrow‐band fluorescence (blue) in the film state. It also showed a strong red‐shifted narrow‐band fluorescence (green) in the crystalline state as a result of the formation of an offset p‐stacked dimer. More information can be found in the Full Paper by K. Tanaka et al. on page 7161.