Results 11 to 20 of about 3,168 (214)

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

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

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

Halide exchanged Hoveyda-type complexes in olefin metathesis

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   +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

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

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

Beilstein 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, Kseniia A. Alekseeva, Pavel V. Raspertov, Pavel A. Kumandin, Eugeniya V. Nikitina, Atash V. Gurbanov, Fedor I. Zubkov   +6 more
doaj   +1 more source

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

Natural 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, Kenshu Fujiwara, Natsumi Kawamura, Ryo Katoono, Hidetoshi Kawai, Takanori Suzuki   +5 more
doaj   +1 more source

First Total Synthesis of Cryptopyranmoscatone A3 and Crypto­pyranmoscatone B4

SynOpen, 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