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Le r arrangement sigmatropique suprafacial d'un atome d'hydrog ne concert ne jouit ... structure de transition de cette isom risation est un anneau de H ckel 4 lectrons: ...

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Hydroxy-directed and Diastereoselective Epoxidation. Allylic Conformation and Strain ... hydroxy-directed. peracid epoxidation. transition-metal. mediated ...

Most steroids also have a side chain. on ring D and angular methyl groups ... Holarrhena spp. used in India to treat amoebic dysentery. insecticide (-)-solasodine ...

... catalyze MPV - Np(III) is oxidized by ketones, but not by iso ... coordination, but ketones and alcohols oxidize U(III) to U(IV), and ketones oxidize Np(III) ...

Title: 1 Author: paige001 Last modified by: AAA Created Date: 12/5/2005 3:24:28 PM Document presentation format: Other titles

RUP-DmA 1 0. Dinosaur meets Archaeopteryx? Seven Theses on Rational's Unified Process (RUP) ... needed now - is not new names for old phases, but other, more ...

Shikimate pathway Shikimic acid is produced from a combination of phosphoenolpyruvate, ... The shikimate pathway leads to a variety ... The aromatic amino acids ...

for differentiation of ketone and ester. for differentiation of halogens (I, Ts Cl) ... coupling with a,b-unsaturated ketones and aldehydes is possible with ...

Migration of a s-bond across a conjugated p-system ... Bruckner, Angew. Chem. Int. Ed. 1988, 27, 278 [2,3] Sigmatropic Rearrangements. Steric Effects ...

18 Important (and sometimes forgotten) organic transformations Original idea from Macmillan group presentation: http://www.princeton.edu/chemistry/macmillan/group ...

This mechanism is designated SN1 where S = substitution N = nucleophilic 1 = unimolecular (only one species is involved in the rate-determining step) ...

Catedr tico de Escuela Universitaria Profesor Titular de Universidad ... Falla con sustratos sensibles al cido o de muy alto peso molecular. ...

1 Cyclization occurs from all-trans squalene epoxide. 2 - The squalene chain is specifically oriented (folded) by the cyclizing ...