Results 21 to 30 of about 938,190 (242)

A reação de metátese de olefinas: reorganização e ciclização de compostos orgânicos The olefin metathesis reaction: reorganization and ciclization of organic compounds

open access: yesQuímica Nova, 2005
The olefin metathesis reaction allows the exchange of complex alkyl units between two olefins, with the formation of a new olefinic link and a sub-product olefin usually ethylene.
Daniel Frederico   +2 more
doaj   +1 more source

Recent applications of ring-rearrangement metathesis in organic synthesis

open access: yesBeilstein Journal of Organic Chemistry, 2015
Ring-rearrangement metathesis (RRM) involves multiple metathesis processes such as ring-opening metathesis (ROM)/ring-closing metathesis (RCM) in a one-pot operation to generate complex targets.
Sambasivarao Kotha   +4 more
doaj   +1 more source

Synthesis of Cyclic Peptidosulfonamides by Ring-Closing Metathesis [PDF]

open access: yesThe Journal of Organic Chemistry, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Brouwer, A.J., Liskamp, R.M.J.
openaire   +3 more sources

Hoveyda–Grubbs catalysts with an N→Ru coordinate bond in a six-membered ring. Synthesis of stable, industrially scalable, highly efficient ruthenium metathesis catalysts and 2-vinylbenzylamine ligands as their precursors

open access: yesBeilstein Journal of Organic Chemistry, 2019
A novel and efficient approach to the synthesis of 2-vinylbenzylamines is reported. This involves obtaining 2-vinylbenzylamine ligands from tetrahydroisoquinoline by alkylation and reduction followed by the Hofmann cleavage.
Kirill B. Polyanskii   +6 more
doaj   +1 more source

First Total Synthesis of Cryptopyranmoscatone A3 and Crypto­pyranmoscatone B4

open access: yesSynOpen, 2018
The first total synthesis of cryptopyranmoscatones A3 and B4 has been accomplished from d-ribose or but-3-ynol. The key steps involved in the synthesis are oxa-Michael addition, highly diastereo­selective Brown allylation, and ring closing metathesis ...
A. Maheswara Reddy, Gowravaram Sabitha
doaj   +1 more source

Tandem Cyclopropanation/Ring-Closing Metathesis of Dienynes [PDF]

open access: yesJournal of the American Chemical Society, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Brian P, Peppers, Steven T, Diver
openaire   +2 more sources

A New Variant of Fused Cyclic Ether Synthesis Based on Ireland-Claisen Rearrangement and RCM

open access: yesNatural Product Communications, 2013
A new variant of fused cyclic ether synthesis based on Ireland-Claisen rearrangement and ring-closing olefin metathesis (RCM) was developed. The Ireland-Claisen rearrangement and ring-closing olefin metathesis (RCM) was developed.
Daisuke Domon   +5 more
doaj   +1 more source

Light-induced olefin metathesis

open access: yesBeilstein Journal of Organic Chemistry, 2010
Light activation is a most desirable property for catalysis control. Among the many catalytic processes that may be activated by light, olefin metathesis stands out as both academically motivating and practically useful.
Yuval Vidavsky, N. Gabriel Lemcoff
doaj   +1 more source

Stereoselectivity of Macrocyclic Ring-Closing Olefin Metathesis [PDF]

open access: yesOrganic Letters, 2000
[reaction: see text] Macrocyclic ring-closing olefin metathesis using ruthenium catalyst 3 was performed to produce a 14-membered lactone. The E/Z ratio of lactone was high regardless of the R group (auxiliary) or the initial alkene stereochemistry.
Lee, Choon Woo, Grubbs, Robert H.
openaire   +4 more sources

Ring Rearrangement Metathesis in 7-Oxabicyclo[2.2.1]heptene (7-Oxanorbornene) Derivatives. Some Applications in Natural Product Chemistry

open access: yesNatural Product Communications, 2017
Metathesis reactions is firmly established as a valuable synthetic tool in organic chemistry, clearly comparable with the venerable Diels-Alder and Wittig reactions and, more recently, with the metal-catalyzed cross-coupling reactions.
Silvia Roscales, Joaquín Plumet
doaj   +1 more source

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