Olefin metathesis can induce both cleavage and formation of c c double bonds special functional groups are not necessary special functional groups are not necessary although this reaction—which can be catalyzed by numerous transition metals—is used in industry, its potential in organic synthesis was not recognized for many years. Chemists report e-selective macrocyclic ring-closing metathesis carbon double bond in a large ring by means of ring-closing olefin metathesis news in the physical sciences & technology. Catalysts for olefin metathesis have been the focus of the research over the past several years as a result, a family of ruthenium catalysts have been developed that have opened the door to a wide variety of applications for olefin metathesis. Olefin metathesis in organic synthesis wendy jen macmillan group meeting january 17, 2001 i well-defined alkene metathesis catalysts ii applications of olefin metathesis. Merrifield resin-assisted routes to second-generation catalysts for olefin metathesis d l nascimento, e c davy and catalysis science & technology.
Yann schrodi associate professor biography education phd massachusetts institute of technology, 2001 development of new olefin metathesis catalysts. The generality and significance of olefin metathesis, together with the chemically and environmentally attractive attributes of the catalysts discussed above, should. Although olefin metathesis can be used to prepare a variety of thermosets from olefins, most of the new applications of this relatively new technology use dicyclopentadiene (dcpd) this monomer is prepared by dimerization of cyclopentadiene, which is in turn produced during cracking of oils. A high-performance, bio-based cleaning agent created by design using olefin metathesis technology keywords: bio-based , cleaning agent , degreaser , laundry detergent , metathesis , methyl 9-dodecenoate.
Abstract the major goals of the work described in this thesis were to expand the selectivity of ruthenium metathesis catalysts to include chemo- and stereoselective reactions and. This account is devoted to a discussion of synthetic applications of olefin metathesis in carbohydrate chemistry olefin metathesis has emerged as a highly promising and exciting area in the contemporary organic synthesis of carbon-carbon bonds metathetic ring-closure (rcm) of diene precursors is. Olefin metathesis has been employed in the efficient syntheses of a catenane with the templation being provided by the recognition between a secondary ammonium ion and a crown ether. In conclusion, isomerizing olefin metathesis with (bio)ethylene allows converting rme into olefin mixtures that match the boiling behavior of diesel fuel as specified in en 590 this technology may turn out to be a decisive breakthrough toward increasing the content of renewables in diesel fuel.
Olefin metathesis olefin metathesis is an exchange reaction between two alkylidene fragments by the scission and regeneration of the carbon-carbon double read more. The core expertize encompasses olefin metathesis, a technology established as a powerful tool for the creation of commercial products in these industries the mission of apeiron synthesis is to fully realize the potential of olefin metathesis in synthetic chemistry by virtue of efficient and cost-effective catalytic systems for r&d and. Olefin cross metathesis (cm) is a convenient route to functionalized and higher olefins from simple alkene precursors cross metathesis has recently gained prominence due to the.
Olefin metathesis olefin metathesis is a chemical reaction in which a molecule with a pair of carbon-carbon double bonds, known also as olefins or hydrocarbons, come together and exchange carbon atoms with one another, forming new value-added molecules in the process. Reports emphasize developments for propylene production via metathesis of ethylene and butenes that have potential implications for the chemical and energy industries. Olefin metathesis opens up new industrial routes to important petrochemicals, oleochemicals, polymers and specialty chemicals the most important applications of olefin metathesis in the field of petrochemicals are the olefins conversion technology (oct) process (originally the phillips triolefin process) and the shell higher olefins process (shop.
In olefin metathesis, the designing of better catalysts has been the key to the success of its utility throughout the history of olefin metathesis research, the development of new and improved catalysts has brought new applications and new strucures that are accessible by olefin metathesis routes. Materia exclusively licenses dr grubbs' core olefin metathesis patent estate from the california institute of technology (caltech) 2002 adding to our technology portfolio, materia exclusively licenses complementary metathesis catalyst technology from boston college. Apeiron synthesis, research partner in the cosmos project, has developed a new class of olefin metathesis catalysts these catalysts proved to be extremely effective in the formation of both terminal and internal c=c bonds the results of this research have recently been published in angewandte.