Results 221 to 230 of about 46,609 (242)
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Diastereoselective Total Synthesis of (±)‐Schindilactone A
Angewandte Chemie, 2011Schindilactone A (1) and structures 2–4 (Scheme 1a) are representative members of a novel group of nortriterpenoids isolated by Sun and co-workers from the plants of Schisandraceae, which have been used in China for the treatment of rheumatic lumbago and related diseases.
Zhixing Chen +16 more
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Diastereoselective Carbometalation of Vinyl Metals
The Journal of Organic Chemistry, 1994AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Ilane Marek +2 more
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Diastereoselectivity in Organic Reactions
2016This chapter deals with the facial selectivity of nucleophilic additions to carbonyl compounds. This is explained using models such as the Cram’s model, Anh–Felkin modification of Cram’s model, Houk’s transition structure model, Houk’s electrostatic model, Cieplak’s σ → σ*# model, and cation coordination model.
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ChemInform Abstract: Diastereoselective Reactions of Sulfoximines
ChemInform, 1992AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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A diastereoselective route to (±)-isoretronecanol
Tetrahedron Letters, 1981Abstract N-Unsubstituted imides react with 1-carboethoxycyclopropyltriphenylphosphonium tetrafluoroborate to yield N-acyl-Δ2-pyrroline, pyrrolizidine, and indolizidine derivatives.
Wilhelm Flitsch, Petra Wernsmann
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A diastereoselective synthesis of girolline
Tetrahedron Letters, 1991Girolline (RP 49532, 1), a new antitumour agent, was prepared in the racemic series using an oxidation-reduction sequence starting from (±)-erythro-β-chloro-γ-hydroxy- 1-triphenylmethyl-1H-4-imidazolepropanamine 3. The heterocyclic amino function was introduced via the coupling reaction of 9 with an aryldiazonium salt, followed by the reduction ...
C. Guérémy, Alain Commercon
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Diastereoselection through chiral conformations.
Enantiomer, 2000Chiral conformations of flexible molecules may develop in a concerted manner if the molecule is crowded enough to assure sufficient level of through-the-space contacts. Higher number (> 4) of groups connected to the same atom, as in many coordination compounds, can be advantageous in this respect.
M. Szabo +6 more
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PHAs made diastereoselectively
C&EN Global Enterprise, 2019Polyhydroxyalkanoates (PHAs) are poised to be the next big thing in biodegradable polymers. That’s because PHAs don’t need to go to industrial composting facilities to degrade. Instead, they break down in ambient environments, even in the ocean. PHAs are made industrially with bacteria via fermentation, but the process can be slow and expensive. Eugene
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Diastereoselective Hydrogenation of Imines
Synfacts, 2010S. Tummala +3 more
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