4469-66-3Relevant academic research and scientific papers
Desymmetrization of diolefinic diols by enantioselective amino-thiocarbamate-catalyzed bromoetherification: Synthesis of chiral spirocycles
Tay, Daniel Weiliang,Leung, Gulice Y. C.,Yeung, Ying-Yeung
supporting information, p. 5161 - 5164 (2014/05/20)
A facile, efficient, and highly diastereo- and enantioselective bromoetherification of diolefinic diols has been developed using an amino-thiocarbamate catalyst. Further manipulations of the bromoether products enabled entry into a new class of spirocycle
Chiral hetero- and carbocyclic compounds from the asymmetric hydrogenation of cyclic alkenes
Verendel, J. Johan,Li, Jia-Qi,Quan, Xu,Peters, Byron,Zhou, Taigang,Gautun, Odd R.,Govender, Thavendran,Andersson, Pher G.
supporting information; experimental part, p. 6507 - 6513 (2012/06/29)
Several types of chiral hetero- and carbocyclic compounds have been synthesized by using the asymmetric hydrogenation of cyclic alkenes. N,P-Ligated iridium catalysts reduced six-membered cyclic alkenes with various substituents and heterofunctionality in good to excellent enantioselectivity, whereas the reduction of five-membered cyclic alkenes was generally less selective, giving modest enantiomeric excesses. The stereoselectivity of the hydrogenation depended more strongly on the substrate structure for the five- rather than the six-membered cyclic alkenes. The major enantiomer formed in the reduction of six-membered alkenes could be predicted from a selectivity model and isomeric alkenes had complementary enantioselectivity, giving opposite optical isomers upon hydrogenation. The utility of the reaction was demonstrated by using it as a key step in the preparation of chiral 1,3-cis-cyclohexane carboxylates. Copyright
Iridium-catalyzed hydroiodination of functionalized alkynes
Ez-Zoubir, Mehdi,Brown, Jack A.,Ratovelomanana-Vidal, Virginie,Michelet, Véronique
experimental part, p. 433 - 441 (2011/02/16)
The efficiency of an Ir(I)/HI system has been studied. The association of hydroiodic acid with iridium has been tested in the catalytic hydroiodination of alkynes. The use of [Ir(cod)Cl]2 dimer led to clean hydroiodination reactions and afforde
CYSTEINE PROTEASE INHIBITORS
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Page/Page column 49, (2010/02/07)
The present invention is directed to compounds that are inhibitors of cysteine protease, in particular, cathepsins B, K, L, F, and S and are therefore useful in treating diseases mediated by these proteases. The present invention is directed to pharmaceut
NEW PALLADIUM MEDIATED CYCLOPENTANATION OF ALKANES BEARING A δ NUCLEOPHILIC SUBSTITUENT
Fournet, Guy,Balme, Genevieve,Gore, Jacques
, p. 69 - 70 (2007/10/02)
A ?-alkylpalladium intermediate generated by carbopalladation of a double bond can be intramolecularly trapped by a β-diester or a β-keto ester enolate if a cyclopentane ring is formed.Otherwise, normal β-elimination is observed.
