Results 81 to 90 of about 26,606 (255)
An efficient synthesis of the guaiane sesquiterpene (−)-isoguaiene by domino metathesis
Beilstein Journal of Organic Chemistry, 2019 (−)-Isoguaiene was prepared from (S)-citronellal in only 9–10 steps with good overall yields. Either a trienyne or a dienediyne metathesis and highly diastereoselective organocatalytic Michael additions of aldehydes derived from (S)-citronellal served as
Yuzhou Wang +3 more
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MoleculesThe influence of steric hindrance caused by the dienophiles on the stereoselectivity of cycloadditions of 2H-pyran-2-ones with maleimides was investigated in this study.
Marko Krivec +3 more
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Highly Diastereoselective Alkylation of 3-Substituted Tetrahydroisoquinolines
, 2016 Highly Diastereoselective Alkylation of 3-Substituted ...
Sabine Laschat (1642789) +3 more
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Diastereoselective Synthesis of Protected 4-epi-Vancosamine from (S)-N-Boc-N,O-isopropylidene-alfa-methylserinal [PDF]
, 2003 An efficient diastereoselective synthesis of methyl N,O-dibenzoyl-L-4-epi-vancosamine is described. The key step involves Sharpless asymmetric dihydroxylation of a Z olefin derived from (S)-N-Boc-N,O-isopropylidene-α-methylserinal.
Corzana, F. [0000-0001-5597-8127] +5 more
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Borylcyclopropanes: Synthetic Strategies and Applications. [PDF]
Angew Chem Int Ed EnglBorylcyclopropanes (cyclopropanes bearing a boron substituent) sit at the intersection of two privileged frameworks in synthesis. This review provides the first exhaustive survey of their chemistry, spanning metal–carbene, nucleophilic cyclization, radical, hydroboration, and C─H activation routes, and documenting applications in medicinal chemistry ...
Butt AA, Ready JM.
europepmc +3 more sources
Diastereoselective Synthesis of (±)-epi-Subincanadine C
, 2018 Starting from indolylmaleimide, concise and efficient total synthesis of (±)-epi-subincanadine C was described via stereoselective Wittig olefination, base-induced selective mono-prenylation, regioselective Grignard reaction, diastereoselective Pictet ...
Manojkumar G. Kalshetti (4491070) +1 more
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Diastereoselection: Introduction [PDF]
Chemical Reviews, 1999 B W, Gung, B, le Noble
openaire +2 more sources
International Journal of Chemistry, 2011 This study was aimed at determining the effect, if any, that steric factors may have on the diastereoselectivity in the spiroannulation of simple phenols. A series of phenols bearing different size substituents ortho to the phenolic hydroxyl were synthesized and spiroannulated to the corresponding spiroethers in good to excellent yields (76-94 ...
Guy L Plourde, Lyndia M. Susag
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Total Asymmetric Synthesis of Glycomimetics and Polypropionates of Biological Interest
CHIMIA, 2008 Using readily available chiral auxiliaries such as (+)- and (?)-camphanic acid, (R,R)- and (S,S)-tartaric acid derivatives (e.g. RADO(R)-COCl, SADO(R)-COCl) efficient diastereoselective syntheses of rare sugars and glycomimetics have been ...
Pierre Vogel
doaj +1 more source
Towards the total synthesis of keramaphidin B
Beilstein Journal of Organic Chemistry, 2016 The enantio- and diastereoselective Michael addition of a δ-valerolactone-derived pronucleophile to a substituted furanyl nitroolefin catalysed by a bifunctional cinchonine-derived thiourea has been used as the key stereocontrolling step in a new ...
Pavol Jakubec +2 more
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