Naturalproductman’s Blog

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Archive for the ‘Transition Metal’ Category

Reactions involving transition metals

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 »

Ascospiroketal A synthesis

Posted by naturalproductman on November 8, 2014

Robert Britton and co-workers from Simon Fraser University have reported in ACIE on the synthesis of ascospiroketal A through a silver cascade reaction.

silver

ACIE paper

Posted in Cascade Reactions, Methodology, Silver, Total Synthesis, Transition Metal | Leave a Comment »

Neopeltolide through metathesis

Posted by naturalproductman on November 8, 2014

Hoveyda and co-workers have reported in ACIE on the synthesis of neopeltolide.

metathesis

ACIE paper

Posted in Metathesis, Methodology, Ruthenium, Total Synthesis, Transition Metal | Leave a Comment »

Alkyl halides from aryl halides

Posted by naturalproductman on November 8, 2014

Zhenfeng Xi and co-workers from SIOC have reported in ACIE on the transfer of a halogen from an aryl group to an alkyl group.

reductive elimination

ACIE paper

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

Pd pi-allyl

Posted by naturalproductman on November 8, 2014

Shu-Li You and co-workers at SIOC have reported in JACS on some mechanistic studies of a Pd pi-allyl chemistry.

pi allyl

JACS paper

Posted in Asymmetric, Mechanistic, Methodology, Named Reactions, Palladium, Transition Metal, Tsuji-Trost | Leave a Comment »

Disorazole through cross metathesis

Posted by naturalproductman on November 8, 2014

Hoveyda and co-workers from Boston College have reported in JACS on a Z-selective cross coupling to access this C2-symmetric molecule – using alkenyl boronate and alkenyl iodide moieties.
metathesis

JACS paper

Posted in Alkaloids, C2-Symmetric, Metathesis, Methodology, Oxazoles, Ruthenium, Transition Metal | Leave a Comment »

Alkyne to sulfone

Posted by naturalproductman on November 8, 2014

Bernhard Breidt and co-workers at Albert-Ludwigs-Universität Freiburg in Germany have reported in JACS on a rhodium catalyzed transformation of terminal alkynes to branched sulfones.

sulfone

JACS paper

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

S and Cl onto an alkyne

Posted by naturalproductman on November 4, 2014

Yasushi Nishihara and co-workers from Okayama University have reported in ACIE on an iron catalyzed addition of a sulfur and chlorine onto an alkyne.

iron

ACIE paper

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

Asymmetric aza-Pinacol rearrangement

Posted by naturalproductman on November 4, 2014

Yong-Gui Zhou and co-workers at SIOC have reported in JACS on an asymmetric aza-Pinacol rearrangement.

asymmetric

JACS paper

Posted in Asymmetric, Aza-Pinacol, Cascade Reactions, Methodology, Named Reactions, Palladium, Ring expansion, Transition Metal | Leave a Comment »

Intermolecular hydroamination

Posted by naturalproductman on October 29, 2014

Stephen Buchwald and colleague have reported in JACS on an asymmetric intermolecular hydroamination reaction. I personally have tried an intermolecular hydroamination using a platinum catalyst, and it failed. This protocol is hopefully a good alternative.

copper

JACS paper

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

 
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