A rational explanation of the high catalytic activity of complex 14 in AAC should include the above mentioned elements together with the ability of the aNHC ligand to protect the silver (I) ion and stabilize some intermediates such as silver acetylides
. Thus, the reaction mechanism probably occurs through the formation of an intermediate like the silver acetylide
complex 16 derived from an alkyne 15 and silver complex 14, with the subsequent hydrogen interchange from the alkyne carbon to the imidazolylidene ring (Scheme 3).
All of the platinum acetylide
complexes exhibited SHG with intensities within ca.
Phaseic acid is produced from this compound by alkylation with an acetylide
of a protected enynal, followed by standard functional group manipulations.
Fokin, "Copper-catalyzed azide-alkyne cycloaddition (CuAAC) and beyond: new reactivity of copper(I) acetylides
," Chemical Society Reviews, vol.
Formation of carbon-encapsulated metallic nano-particles from metal acetylides
by electron beam irradiation.
Sadoway, MIT, carried out exploratory studies into the technological feasibility of the synthesis of diamond-like carbon films from solution (as opposed to the fairly well developed technology used for chemical vapour deposition) by electrochemical oxidation of acetylene and acetylides
. As they reported in the symposium "Electrochemistry at the Edge," thin carbon films were successfully deposited by this method and thicker conducting films could be grown by addition of boron to produce a p-doped semiconductor.
Writing for professionals, the authors cover theoretical studies on acetylenic scaffolds, synthesis of heterocycles and carbocycles by electrophilic cyclization of alkynes, addition of terminal acetylides
to CO and CN electrophiles, transition metal acetylides
, acetylenosaccharides, semiconducting poly(arylene ethylene)s, polyynes via alkylidene carbenes and carbenoids, macrocycles based on phenylacetylene scaffolding, carbon-rich compounds, shape-persistent acetylenic macrocycles for ordered systems, and chiral acetylenic macromolecules.
Trombini, "A strikingly fast route to methylmercury acetylides
as a new opportunity for monomethylmercury detection," Journal of Organometallic Chemistry, vol.
Todd Marder's, MCIC, longtime interest in rhodium and iridium acetylides
has lead to their exploitation as synthons for generating organometallic polymers which also conduct electricity in one dimension.