Regioselective Nickel-Catalyzed Reductive Couplings of Enones and Allenes
作者:Wei Li、Nan Chen、John Montgomery
DOI:10.1002/anie.201004740
日期:2010.11.8
Alkenes made easy: In a complement to coupling processes of terminal alkynes, the reductivecoupling of enones and allenes provides access to conjugate addition products that possess a 1,1‐disubstituted alkene (see scheme; cod=1,5‐cyclooctadiene). The solvent composition and reducing agent must be carefully matched to allow high levels of regioselectivity to be observed.
Synthetic Studies Toward Pectenotoxin 2. Part I. Stereocontrolled Access to the C<sub>10</sub>−C<sub>22</sub> Fragment
作者:Jatta E. Aho、Elina Salomäki、Kari Rissanen、Petri M. Pihko
DOI:10.1021/ol8015868
日期:2008.10.2
A highly stereocontrolled and efficient synthesis for a fully functionalized C 10-C 22 fragment of pectenotoxin 2 is described using a convergent sequence involving a stereoselective methylation of beta-hydroxyketone as a key step.
Synthetic Studies towards Pectenotoxin-2: Synthesis of the Nonanomeric 10-epi-ABCDE Ring Segment by Kinetic Spiroketalization
作者:Jatta E. Aho、Antti Piisola、K. Syam Krishnan、Petri M. Pihko
DOI:10.1002/ejoc.201001411
日期:2011.3
The synthesis of the nonanomeric10-epi-ABCDEring system of pectenotoxin-2 has been achieved by using a kineticspiroketalization reaction. The synthesis of the spiroketalization precursor was achieved through a cross-metathesis/hydro-genation sequence. The formation of the epi-C10 isomer resulted from an unexpected anti-Felkin selective addition of organometallic nucleophiles to the advanced CDE