Chiral diphosphine ligands based on camphor: synthesis and applications in asymmetric hydrogenations
作者:Renat Kadyrov、Ilyas Z. Ilaldinov、Juan Almena、Axel Monsees、Thomas H. Riermeier
DOI:10.1016/j.tetlet.2005.08.103
日期:2005.10
The synthesis of a novel class of atropisomer chiral diphosphineligands with a bornene framework is described. The new ligands showed in Rh catalyzed asymmetric hydrogenation of α- and β-enamides very high ee’s (more than 99%).
Preparation of Functionalized Cyclic Enol Phosphates by Halogen−Magnesium Exchange and Directed Deprotonation Reactions
作者:Fabian M. Piller、Tomke Bresser、Markus K. R. Fischer、Paul Knochel
DOI:10.1021/jo100763f
日期:2010.7.2
halogen/magnesium exchange reaction or deprotonation using TMP-derived magnesium amide bases. The resulting magnesium reagents react readily with a wide range of electrophiles like allyl bromides and acid chlorides or can be used in Pd-catalyzed cross-coupling reactions. Several optically pure enol phosphates were prepared starting from readily available d-(+)-camphor derivatives.
α-Trialkylsilylketones from α-bromoketones: utilization of a 1,3-O to C silyl migration
作者:Paul Sampson、David F. Wiemer
DOI:10.1039/c39850001746
日期:——
A new route fromα-bromoketones to α-trailkylsilylketones has been developed which demonstrates the viability of halogen-metal exchange vis-a-vis nucleophilic attack at silicon, even with the unhindered trimethylsilyl group.
[EN] NOVEL ARYLATED CAMPHENES, PROCESSES FOR THEIR PREPARATION AND USES THEREOF<br/>[FR] NOUVEAUX CAMPHÈNES ARYLÉS, PROCÉDÉS DE PRÉPARATION ET UTILISATIONS DE CEUX-CI
申请人:YISSUM RES DEV CO
公开号:WO2011061744A3
公开(公告)日:2011-09-29
Synthesis and<sup>125</sup>Te NMR Spectroscopy of α-Tellurocarbonyl Compounds and Derivatives
作者:Louis A. Silks、Jerome D. Odom、R. Bruce Dunlap
DOI:10.1080/00397919108019802
日期:1991.4
The reaction of lithium alkyl-, alkenyl-, alkynyl-, and aryl tellurolates with alpha-bromocarbonyl compounds in anhydrous tetrahydrofuran gives the title compounds in yields ranging from 55-92%. The Te-125 NMR chemical shift range for these compounds is 405-1024 ppm.