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Metathesis Sequence (metathesis + sequence)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

ChemInform Abstract: Synthesis of Stereodefined Substituted Cycloalkenes by a One-Pot Catalytic Boronation,Allylation,Metathesis Sequence.

CHEMINFORM, Issue 2 2009
Nicklas Selander
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Ruthenium-Catalyzed Silyl Ether Formation and Enyne Metathesis Sequence: Synthesis of Siloxacycles from Terminal Alkenyl Alcohols and Alkynylsilanes.

CHEMINFORM, Issue 46 2004
Reagan L. Miller
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Sequential Catalysis: A Metathesis/Dihydroxylation Sequence.

CHEMINFORM, Issue 27 2006
Samuel Beligny
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source]

Stereoselective Synthesis of Tetrahydrofuran Spiro- , -Lactams by Ru-Catalyzed Metathesis of 7-Oxabicyclo[2.2.1]heptenes

HELVETICA CHIMICA ACTA, Issue 6 2005
Aurelio
A new method for the synthesis of spiro- , -lactams tethered to tetrahydrofuran rings is described. The procedure is based on Ru-catalyzed metathesis sequences with oxanorbornene precursors easily obtained by the Staudinger [2+2] cycloaddition of related imines. [source]

Calix[4]arene-Based Bis[2]catenanes: Synthesis and Chiral Resolution

CHEMISTRY - A EUROPEAN JOURNAL, Issue 21 2007
Olena Molokanova
Abstract The exclusive formation of hydrogen-bonded dimers between tetraaryl and tetratosylurea calix[4]arenes has been used to prepare a series of ten "bisloop" tetraurea calix[4]arenes 3, in which adjacent phenylurea groups are covalently linked through ,,,-dioxyalkane chains. This dimerization with tetratosylurea 2 as template preorganizes the alkenyl residues of tetra(m -alkenyloxyphenyl) ureas 1 and enables their selective connection in high yield (up to 95,%) by olefin metathesis followed by hydrogenation. The "bisloop" calixarenes 3 also exclusively form heterodimers with 1. Thus, in a separated metathesis/hydrogenation sequence, a series of 14 cyclic bis[2]catenanes 4, in which two calix[4]arenes are connected through their wide rims by two pairs of interlocked rings (total size 29 to 41 atoms), were prepared in yields of up to 97,%. Optical resolution of these chiral bis[2]catenanes was studied by HPLC on chiral stationary phases. The single-crystal X-ray structure of one example (4(P,10)) confirmed the interlocking rings and revealed that the hydrogen-bonded dimeric capsule of the calix[4]arene can be "completely" opened. [source]