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Isolation, characterization and modification of zerumbone from
Isolation, characterization and modification of zerumbone from

pptx
pptx

... the skilled experimentalist to stop at the alkene. This is a particularly good way to generate cis double bonds. Note that the Wittig reaction also gives cis alkenes (usually), but most other olefinations give trans products. Therefore partial reduction from an alkyne can be a useful strategy! ...
Topic 16 notes - A
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... Optical isomers are often found together in a mixture in equal quantities. The opposite effect they have on the rotation of plane polarised light will thus result in no overall rotation. An equimolar mixture of two optical isomers will thus have no effect on plane polarised light and is thus not opt ...
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... cosmetic industries. Sugarcane wax also can be applied in pharmaceutics, due to the presence of long chain aliphatic alcohol (policosanol) that appears to have hypocholesterolemic effect. Waxes extracted from sugarcane filter mud, from sugarcane harvested in 2001 in Sao Paulo, Brazil were analyzed. ...
AMIDES AND AMINES: ORGANIC NITROGEN COMPOUNDS
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... Amines are bases while carboxylic acids and phenols are acids. Alcohols and amides are neither acids nor bases. (a) amine, base (b) amide, neither (c) amide, neither (d) carboxylic acid, acid (e) alcohol, neither (f) alcohol, neither ...
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Petasis reaction



The Petasis reaction (alternatively called the Petasis borono–Mannich (PBM) reaction) is the chemical reaction of an amine, aldehyde, and vinyl- or aryl-boronic acid to form substituted amines.Reported in 1993 by Nicos Petasis as a practical method towards the synthesis of a geometrically pure antifungal agent, naftifine, the Petasis reaction can be described as a variation of the Mannich reaction. Rather than generating an enolate to form the substituted amine product, in the Petasis reaction, the vinyl group of the organoboronic acid serves as the nucleophile. In comparison to other methods of generating allyl amines, the Petasis reaction tolerates a multifunctional scaffold, with a variety of amines and organoboronic acids as potential starting materials. Additionally, the reaction does not require anhydrous or inert conditions. As a mild, selective synthesis, the Petasis reaction is useful in generating α-amino acids, and is utilized in combinatorial chemistry and drug discovery.
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