75455-41-3Relevant academic research and scientific papers
Enantiomerically Enriched α-Borylzinc Reagents by Nickel-Catalyzed Carbozincation of Vinylboronic Esters
Zhang, Chenlong,Hu, Weipeng,Lovinger, Gabriel J.,Jin, Jing,Chen, Jingjia,Morken, James P.
supporting information, p. 14189 - 14195 (2021/09/11)
In this paper is described a synthesis of enantiomerically enriched, configurationally stable organozinc reagents by catalytic enantioselective carbozincation of a vinylboronic ester. This process furnishes enantiomerically enriched α-borylzinc intermediates that are shown to undergo stereospecific reactions, producing enantioenriched secondary boronic ester products. The properties of the intermediate α-borylzinc reagent are probed and the synthetic utility of the products is demonstrated by application to the synthesis of (-)-aphanorphine and (-)-enterolactone.
Fragmentation Behaviour of ω-Functionalized Allenes and their Isomeric Acetylenes under Electron Impact. Study on the Isomerization of Molecular Ions and Structural Assignment of Heteroatom Migration related to a McLafferty-type Rearrangement by CAD-MIKE Spectrometry
Arseniyadis, Simeon,Gore, Jacques,Guenot, Pierre,Carrie, Robert
, p. 1413 - 1418 (2007/10/02)
CAD-MIKE Spectra of ions (1)-(6) are discussed.The main fragmentation pathway, loss of an ethylenic fragment leading to C4H5X+. ion, has been confirmed to proceed via a McLafferty-type rearrangement by comparison of the CAD-MIKE spectra of this ion to those of model structures.It is further shown, by means of kinetic-energy-release measurements (T values), that the investigated isomeric species do not interconvert after electron impact to an appreciable extent.
