Reference of Ethyltriphenylphosphonium bromideIn 2020 ,《Unprecedented Selectivity of Ruthenium Iodide Benzylidenes in Olefin Metathesis Reactions》 was published in Angewandte Chemie, International Edition. The article was written by Nechmad, Noy B.; Phatake, Ravindra; Ivry, Elisa; Poater, Albert; Lemcoff, N. Gabriel. The article contains the following contents:
The development of selective olefin metathesis catalysts is crucial to achieving new synthetic pathways. Herein, we show that cis-diiodo/sulfur-chelated ruthenium benzylidenes do not react with strained cycloalkenes and internal olefins, but can effectively catalyze metathesis reactions of terminal dienes. Surprisingly, internal olefins may partake in olefin metathesis reactions once the ruthenium methylidene intermediate has been generated. This unexpected behavior allows the facile formation of strained cis-cyclooctene by the RCM reaction of 1,9-undecadiene. Moreover, cis-1,4-polybutadiene may be transformed into small cyclic mols., including its smallest precursor, 1,5-cyclooctadiene, by the use of this novel sequence. Norbornenes, including the reactive dicyclopentadiene (DCPD), remain unscathed even in the presence of terminal olefin substrates as they are too bulky to approach the diiodo ruthenium methylidene. The exptl. results are accompanied by thorough DFT calculations In addition to this study using Ethyltriphenylphosphonium bromide, there are many other studies that have used Ethyltriphenylphosphonium bromide(cas: 1530-32-1Reference of Ethyltriphenylphosphonium bromide) was used in this study.
Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. CatOnium ETPB is also used as catalysts in the synthesis of certain organic compounds.Reference of Ethyltriphenylphosphonium bromide
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary