Results 11 to 20 of about 938,190 (242)

Halide exchanged Hoveyda-type complexes in olefin metathesis [PDF]

Beilstein Journal of Organic Chemistry, 2010
The aims of this contribution are to present a straightforward synthesis of 2nd generation Hoveyda-type olefin metathesis catalysts bearing bromo and iodo ligands, and to disclose the subtle influence of the different anionic co-ligands on the catalytic ...
Julia Wappel, César A. Urbina-Blanco, Mudassar Abbas, Jörg H. Albering, Robert Saf, Steven P. Nolan, Christian Slugovc   +6 more
doaj   +2 more sources

Tandem Ring‐Opening–Ring‐Closing Metathesis for Functional Metathesis Catalysts [PDF]

Angewandte Chemie International Edition, 2016
Abstract Use of a tandem ring‐opening–ring‐closing metathesis (RORCM) strategy for the synthesis of functional metathesis catalysts is reported. Ring opening of 7‐substituted norbornenes and subsequent ring‐closing metathesis forming a thermodynamically stable 6‐membered ring lead to a very efficient synthesis of new catalysts from ...
Amit A. Nagarkar, Mohammad Yasir, Aurelien Crochet, Katharina M. Fromm, Andreas F. M. Kilbinger   +4 more
core   +9 more sources

Selective Enyne Ring-Closing Metathesis with Main Group Metal Catalysts [PDF]

, 2022
Ring-closing metathesis (RCM) represents an ideal and atom-economical way to construct cyclic compounds. The precedented reaction systems for endo-selective enyne RCM mainly rely on precious transition metal carbene complexes or activated substrates ...
Zhi-Xiang, Yu, Chi, Zhang, Lian-Gang, Zhuo, Yi, Wang   +3 more
core   +1 more source

The catalytic performance of Ru–NHC alkylidene complexes: PCy3 versus pyridine as the dissociating ligand

Beilstein Journal of Organic Chemistry, 2010
The catalytic performance of NHC-ligated Ru-indenylidene or benzylidene complexes bearing a tricyclohexylphosphine or a pyridine ligand in ring closing metathesis (RCM), cross metathesis, and ring closing enyne metathesis (RCEYM) reactions is compared ...
Stefan Krehl, Diana Geißler, Sylvia Hauke, Oliver Kunz, Lucia Staude, Bernd Schmidt   +5 more
doaj   +1 more source

Studies Towards the Total Synthesis of Di- and Sesterterpenes with Dicyclopenta[a,d]cyclooctane Skeletons. Three-component Approach to the A/B Rings Building Block

Molecules, 2005
Sesqui- and sesterterpenes of ophiobolin and fusicoccin families are important synthetic targets because of complexity of structure and potentially useful physiological activities, including anti-tumor activity.
J. Wicha, M. Michalak, K. Michalak
doaj   +1 more source

Synthesis of fluorinated δ-lactams via cycloisomerization of gem-difluoropropargyl amides

Beilstein Journal of Organic Chemistry, 2010
gem-Difluoro-1,7-enyne amides are suitable building blocks for the synthesis of difluorodihydropyridinones via a ring-closing metathesis reaction, and of 4,4-difluoro-3-oxoisoquinolines through a ring-closing metathesis–enyne metathesis tandem reaction ...
Satoru Arimitsu, Gerald B. Hammond
doaj   +1 more source

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

Química 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, Ursula Brocksom, Timothy John Brocksom   +2 more
doaj   +1 more source

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

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

Recent applications of ring-rearrangement metathesis in organic synthesis

Beilstein 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, Milind Meshram, Priti Khedkar, Shaibal Banerjee, Deepak Deodhar   +4 more
doaj   +1 more source

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

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