Other

University of California

Centre National De La Recherche Scientifique

Societe De Conseils De Recherches Et D'applications Scientifiques (s.c.r.a.s.)

California Institute of Technology

Rhodia Fiber & Resin Intermediates

Guy Bertrand

Jean-Bernard Cazaux

Heinz Gornitzka

Didier Bourissou

Blanca Martin-Vaca

Anca Dumitrescu

Vincent Lavallo

Olivier Guerret

Bruno Donnadieu

R&eacute;gis Reau

Robert H Grubbs

Dennis Bigg

Scott C Virgil

Paolo Burattin

Vanessa M Marx

Benjamin Keith Keitz

Gregorio Gulsado-Barrios

Yves Canac

Jean Bouffard

Martin-Vaca Blanca

Hanh Nguyen Ngoc

Christophe Buron

Mohand-Ameziane Melaimi

Lutz Stelzig

Adam C Dyker

Hanh Nguyen

Jean-Luc Faure

Guido D Frey

Norbert Emig

Jean Bernard Cazaux

Michele Soleilhavoup

St&eacute;phanie Goumri

The present invention provides novel and stable crystalline 1H-1,2,3 triazolium carbenes and metal complexes of 1H-1,2,3 triazolium carbenes. The present invention also provides methods of making 1H-1,2,3 triazolium carbenes and metal complexes of 1H-1,2,3 triazolium carbenes. The present invention also provides methods of using 1H-1,2,3 triazolium carbenes and metal complexes of 1H-1,2,3 triazolium carbenes in catalytic reactions.

Crystalline 1H-1,2,3-triazol-5-ylidenes

Described herein are compounds and methods of catalyzing ethenolysis reactions, optionally on an industrial scale. In certain embodiments, the catalysts bear cyclic alkyl amino carbene (CAAC) ligands with an ortho substituent, such as a methyl substituent, on an N-aryl ring. When used to catalyze ethenolysis reactions, certain such compounds produce a turnover number greater than 50,000.

Cyclic alkyl amino carbene (CAAC) ruthenium complexes as improved catalysts for ethenolysis reactions

Stable, bent allenes, organometallic complexes of bent allenes are provided along with methods of conducting chemical processes such as olefin metathesis, comprising contacting an olefin substrate with an organometallic complex as described herein, under suitable conditions.

Bent allenes, and their metal complexes

Methods are provided for the catalytic hydroamination of compounds having an alkyne or allene functional group, in which the compound is contacted with ammonia or an amine in the presence of a catalytic amount of a gold complex under conditions sufficient for hydroamination to occur.

Gold catalyzed hydroamination of alkynes and allenes

Stable carbene ligands are provided having a carbene center flanked by a quaternary carbon and an amino group, and having utility in the preparation of various transition metal complexes.

Stable cyclic (alkyl)(amino) carbenes as ligands for transition metal catalysts

The invention concerns the use of zinc derivatives of general formula (I) wherein: Lrepresents a group of formula: &#x2014;E(R)(R')(R&#x2033;), &#x2014;E(R) (R&#x2032;) or &#x2014;E(R); E is an atom of group 15; Land Lindependently represent a group of formula: &#x2014;E(R)(R&#x2032;)(R&#x2033;), &#x2014;E(R)(R&#x2032;) or &#x2014;E(R), or together form a chain of formula &#x2014;L&#x2032;&#x2014;A&#x2014;L&#x2032;&#x2014;; A represents a saturated or unsaturated chain comprising one, two or three elements of group 14; L&#x2032;and L&#x2032;independently represent a group of formula &#x2014;E(R)(R&#x2032;) &#x2014;E(R) or &#x2014;E&#x2014;; Eis an element of group 14; Eis an element of group 15; Eis an element of group 16; R, R&#x2032;, R&#x2033;, R, R&#x2032;and Rrepresent various groups, as (co) polymerisation catalysts of cyclic esters 

Use of zinc derivatives as cyclic ester polymerization catalysts

A subject of the present invention is new compounds having a lanthanide and having a tridentate ligand, a process for their preparation and their use in particular as polymerization catalysts.

Polymerization catalysts

The use of stannylenes and germylenes of general formula (I) wherein: M represents a tin or geranium atom; Land Lindependently represent a group of formula: -E(R) (R') (R&#x2033;), -E(R) (R&#x2032;) or -E(R)) or together form a chain of formula -L&#x2032;-A- L&#x2032;; A represents a saturated or unsaturated chain comprising one, two or three elements of group 14; L&#x2032;and L&#x2032;, represent, independently, a group of formula: -E(R) (R&#x2032;)-, E(R)- or -E-; Eis an element of group 14; Eis an element of group 15; Eis an element of group 16; R, R&#x2032;, R&#x2033;, R, R&#x2032;and Rrepresent variable groups as polymerization catalysts of heterocycles.

Use of stannylenes and germylenes as polymerization catalysts for heterocycles

The invention relates to new compounds having an element of group 12 and having a tridentate ligand, a process for their preparation and their use in particular as a polymerization catalyst.

Polymerisation catalysts

Polymerisation catalyst

The invention concerns novel organometallic complexes comprising cationic heterocyclic carbenes. It also concerns a method for preparing said complexes from dicationic heterocyclic precursor compounds. It further concerns the use as catalysts of said organometallic complexes for a certain number of chemical reactions.

Organometallic complexes comprising cationic heterocyclic carbenes

The invention concerns novel compounds having the elements of group 11, 12 or 14; and a tridentate ligand, a method for preparing them and their use in particular as polymerisation catalyst.

Metal complexes with a tridentate ligand as polymerization catalysts

Novel compounds having one group 13 element bound with one mono- or di-anionic tridentate ligand, a method of preparation thereof and use thereof as a copolymerization catalyst.

Compounds having one group 13 element, bound with one mono- or di-anionic trident ligand, a method of preparation and application thereof as polymerization catalysts

In a process for C-alkylation or N-alkylation, the improvement comprising conducting the C-alkylation or N-alkylation reaction in the presence of a slightly nucleophilic strong base of the following formula

Use of ylides of phosphorus as slightly nuceophilic strong bases

Growing community of inventors

Riverside, CA, United States of America

Guy Bertrand