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Formation of Thermally Robust Frustrated Lewis Pairs by Electrocyclic Ring Closure Reactions
Author(s) -
Chen GuoQiang,
Kehr Gerald,
Daniliuc Constantin G.,
MückLichtenfeld Christian,
Erker Gerhard
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201510994
Subject(s) - frustrated lewis pair , ring (chemistry) , chemistry , lewis acids and bases , photochemistry , phenylene , yield (engineering) , carbon fibers , catalysis , organic chemistry , materials science , polymer , composite material , composite number , metallurgy
The phosphorus/boron‐substituted hexatriene systems 6 undergo thermally induced electrocyclic ring closure to yield the cyclohexadiene‐derived P/B frustrated Lewis pairs (FLPs) 7 . Subsequent TEMPO oxidation gives the phenylene‐bridged FLPs 8 . Both systems activate dihydrogen and the thermally robust FLPs undergo carbon–carbon coupling reactions at a mesityl group upon treatment with dimethyl acetylenedicarboxylate at elevated temperatures.