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Archive for the ‘Transition Metal’ Category

Reactions involving transition metals

Antroquinonol synthesis

Posted by naturalproductman on February 22, 2015

Chinpiao Chen and co-worker from National Dong Hwa University have reported in Organic Letters on the syntheses of antroquinononol and antroquinonol D.

antroquinonol

OL paper

Posted in Iridium, Sesquiterpenes, Total Synthesis, Transition Metal | Leave a Comment »

Alkene methoxycarbonylation

Posted by naturalproductman on February 22, 2015

Matthias Beller and co-workers at Leibniz-Institut für Katalyse an der Universität Rostock have reported in ACIE on a palladium catalyzed methoxycarbonylation of olefins.

Pd

ACIE paper

Posted in Methodology, Palladium, Transition Metal | Leave a Comment »

Gold vinylidene = Intramolecular C-H activation

Posted by naturalproductman on January 23, 2015

Jose Gonzalez and co-workers from the University of Oviedo have reported in ACIE on a gold vinylidene approach for intramolecular C-H activation.

gold vinylidine

ACIE paper

Posted in Cascade Reactions, Gold, Methodology, Transition Metal | Leave a Comment »

Rhenium vinylidene

Posted by naturalproductman on January 23, 2015

Kazuhiko Takai and co-workers from Okayama University have reported in JACS on a rhenium vinylidine approach to form C-C bonds between a terminal alkyne and a methanetricarboxylate.

rhenium

JACS paper

Posted in Methodology, Rhenium, Transition Metal | Leave a Comment »

Desymmetrization via hydramination

Posted by naturalproductman on January 17, 2015

Aaron Sadow and co-workers at Iowa State have reported in JACS on a desymmetrization hydroamination reaction using a zirconium catalyst and the result is different depending on whether the reaction is dilute or concentrated.

concentrated

JACS paper

Posted in Desymmetrization, Methodology, Transition Metal, Zirconium | Leave a Comment »

Silacarboxylation of allenes

Posted by naturalproductman on December 6, 2014

Yasushi Tsuji and co-workers have reported in JACS on a copper catalyzed silacarboxylation of allenes using carbon dioxide and a silylborane.

JACS paper

Posted in Allenes, Copper, Methodology, Transition Metal | Leave a Comment »

Dibromoalkenes from alkynes

Posted by naturalproductman on November 29, 2014

Weimin He and co-workers from Hunan University have reported in JOC on the synthesis of E-dibromoalkenes from alkynes using CuBr2.
copper

JOC paper

Posted in Cascade Reactions, Copper, Methodology, Transition Metal | Leave a Comment »

Multi-component coupling with cobalt

Posted by naturalproductman on November 28, 2014

Xiaobing Wan and co-workers from Soochow University have reported in ACIE on a multi-component coupling approach to access β-Ester-γ-amino ketones.

tbhp

ACIE paper

Posted in Cascade Reactions, Cobalt, Methodology, Multi-Component Coupling, Transition Metal | Leave a Comment »

N-Tosyl hydrazones to alkynes with copper

Posted by naturalproductman on November 28, 2014

Huanfeng Jiang and co-workers from South China University of Technology have reported in ACIE on a copper catalyzed conversion of N-tosyl hydrazones to alkynes. The problem is I don’t know how regioselective this is.

copper

ACIE paper

Posted in Copper, Methodology, Transition Metal | 1 Comment »

Exo vs. endo

Posted by naturalproductman on November 8, 2014

Nicolai Cramer and colleague at EPFL in Switzerland have reported in ACIE on a Ni catalyzed cyclization that undergoes endo or exo cyclization depending on the use of either a carbene or a cyclooctadiene ligand.

cyclo octadiene

ACIE paper

Posted in Methodology, Nickel, Transition Metal | Leave a Comment »

 
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