3040-20-8Relevant articles and documents
COSMETIC OR DERMATOLOGICAL COMPOSITION COMPRISING A POLYMER BEARING JUNCTION GROUPS, AND COSMETIC TREATMENT PROCESS
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, (2010/10/03)
The present patent application relates to a cosmetic or dermatological composition comprising, in a cosmetically or dermatologically acceptable medium, a polymer comprising: (a) a polymer backbone that may be obtained by reaction: of a polyol comprising 3 to 6 hydroxyl groups;of a monocarboxylic acid containing 6 to 32 carbon atoms;of a polycarboxylic acid comprising at least two carboxylic groups COOH, and/or of a cyclic anhydride such as a polycarboxylic acid and/or of a lactone comprising at least one carboxylic group COOH; and(b) at least one junction group linked to the said polymer backbone and capable of establishing H bonds with one or more partner junction groups, each pairing of a junction group involving at least three H (hydrogen) bonds. The patent application also concerns a cosmetic treatment process using the said composition.
Catalytic asymmetric Diels-Alder reactions of 2-pyrone derivatives
Marko, Istvan E.,Evans, Graham R.,Declercq, Jean-Paul
, p. 4557 - 4574 (2007/10/02)
Cycloaddition reactions between the chiral 2-pyrone derivatives 9 and various dienophiles, catalysed by lanthanide shift reagents, afforded diastereomerically pure bicyclic lactones 3. A catalytic asymmetric version of these reactions, using optically act
A New and Efficient Asymmetric Synthesis of an A-Ring Precursor to Physiologically Active 1α-Hydroxyvitamin D3 Steroids
Posner, Gary H.,Carry, Jean-Christophe,Anjeh, Tizah E. N.,French, Andrew N.
, p. 7012 - 7014 (2007/10/02)
A highly stereocontrolled and mild Diels-Alder cycloaddition involving stereochemically matched pyrone (S)-lactate 4 and Lewis acid (-)-Pr(hfc)3 produced bicyclic lactone endo-5 via a double stereodifferentiation process.Bicyclic lactone 5 was then transf
