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Archive for the ‘Allenes’ Category

Reactions involving the use, synthesis, intermediates of allenes.

Omaezallene

Posted by naturalproductman on March 14, 2014

Tatsufumi Okino and co-workers from Hokkaido University have reported in ACIE on the synthesis of omaezallene.

omaezallene

ACIE paper

Posted in Allenes, Asymmetric, Methodology, Total Synthesis | Leave a Comment »

Gold catalyzed sigmatropic rearrangement

Posted by naturalproductman on January 20, 2014

Chepuri Ramana and colleague at CSIR have reported in Chem Comm on a gold catalyzed rearrangement of allenyl ethers.

rearrangement

Chem Comm paper

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

Chiral allene synthesis

Posted by naturalproductman on March 20, 2013

Doug Frantz and co-workers at UT San Antonio have reported in JACS on a palladium catalyzed asymmetric approach to synthesizing axially chiral allenes through beta-hydride elimination.

allene

JACS paper

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

Phosphine catalyzed C-N bond formation

Posted by naturalproductman on January 31, 2013

Greg Fu and co-workers reported on a C2-symmetric phosphine catalyst to

phosphine

ACIE paper

Posted in Allenes, C2-Symmetric, Methodology, Organocatalytic | Leave a Comment »

pyridines from allenes

Posted by naturalproductman on December 29, 2012

Andrei Yudin and co-workers from the University of Toronto have reported in OL on the synthesis of pyridines from allenes.

pyridines

OL paper

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

Jiadifenin synthesis

Posted by naturalproductman on August 29, 2012

Hongbin Zhai and co-workers at SIOC have reported in ACIE on the synthesis of jiadifenin.  The key [2+2] installed the methyl ester substituent.

jiadifenin synthesis

ACIE paper

Posted in Allenes, Cycloaddition, Methodology, Pericyclic reactions, Total Synthesis, [2+2] | Leave a Comment »

Lactone and allene radical cyclization

Posted by naturalproductman on July 20, 2012

David Procter and co-workers from the University of Manchester have reported in JACS on a SmI2-mediated radical cyclization of a lactone bearing an allene to form a 5,7-bicyclic ring system.

allene

JACS paper

Posted in Allenes, Methodology, Radical Chemistry, Seven-Membered Rings | Leave a Comment »

Bi-mediated [3+2]

Posted by naturalproductman on May 11, 2012

Elisabet Dunac and co-workers from CNRS have reported in Organic Letters on a Bi(OTf)3 mediated [3+2] between an allene and aryl group.

3+2

OL paper

Posted in Allenes, Methodology, Ring forming | Leave a Comment »

Ferrier type cascade

Posted by naturalproductman on May 2, 2012

Joseph Kim and co-workers at Sanofi have reported in Tetrahedron Letters on a Ferrier type reaction.

Ferrier

TL paper

Posted in Allenes, Cascade Reactions, Ferrier, Methodology, Named Reactions | Leave a Comment »

Allenoates using NHCs

Posted by naturalproductman on February 21, 2012

Jianwei Sun and co-workers at Hong Kong University of Science and Technology have reported in Organic Letters on a carbene catalyzed formation of allenoates.

allenoates

OL paper

Posted in Allenes, Carbene, Cascade Reactions, Methodology | Leave a Comment »

 
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