5411-71-2

Upstream product

• 4582-20-1 5-oxo-4-oxatricyclo[4.2.1.0^3,7]nonane-9-carboxylic acid 
• 129-64-6 3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride 
• 826-62-0 5-norbornene-2,3-dicarboxylic anhydride 
• 77-73-6 bi(cyclopentadiene) 
• 108-31-6 maleic anhydride 
• 542-92-7 cyclopenta-1,3-diene 
• 6319-07-9 (+/-)-5endo,6exo-dibromo-norbornane-2endo,3endo-dicarboxylic acid 
• 98590-62-6 (+/-)-5endo,6exo-dibromo-norborn-2-ene-2,3-dicarboxylic acid 
• 3853-88-1 cis-5-norbornene-endo-2,3-dicarboxylic acid 
• 98954-78-0 (+/-)-5exo-hydroxy-norbornane-2exo,3exo-dicarboxylic acid 
• 1200-88-0 norbornene-5,6-dicarboxylic acid 
• 2628-74-2 (+/-)-5endo-bromo-6endo-hydroxy-norbornane-2endo,3endo-dicarboxylic acid-2-lactone 
• 2628-74-2 (+/-)-5exo-bromo-6endo-hydroxy-norbornane-2endo,3endo-dicarboxylic acid-2-lactone 

Downstream Products

• 37609-62-4 endo-2-Carboxy-exo-3-carboxy-6-keto-norbornan 
• 57199-09-4 endo-3-methoxycarbonyl-2,6-norbornanecarbolactone 
• 4582-20-1 6-endo-hydroxy-3-exo-carboxynorborn-2-endo-ylcarboxylic acid γ-lactone 
• 37609-62-4 endo-bicyclo[2.2.1]heptan-2-one 5,6-dicarboxylic acid 
• 57199-09-4 (+/-)-5endo-hydroxy-norbornane-2exo,3endo-dicarboxylic acid-3-lactone-2-methyl ester 

Relevant academic research and scientific papers

Functional norbornanyl ester derivatives, polymers and process for preparing same

This invention relates to the new functional norbornanyl ester derivative and/or polymer compositions which are easily obtainable by reacting the Diels-Alder adduct of appropriate dienes and dienophiles with carboxylic acids. In particular, this invention relates to a new process for making cyclic chemical raw materials suitable for production coating, ink, adhesive, plasticizer, thermoplastic or thermosetting plastic and functional polymers.

COSMETIC OR DERMATOLOGICAL COMPOSITION COMPRISING A POLYMER BEARING JUNCTION GROUPS, AND COSMETIC TREATMENT PROCESS

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.

A total synthesis of (±)-hop ether

A total synthesis of the iridoid monoterpene (±)-hop ether (2) is described. The Norrish I type fragmentation of bicyclo[2.2.1]heptone (5) is the key step.{A figure is presented}.

Acid-catalysed Lactonisation and Iodolactonisation of Norbornene-carboxylic Acids

The acid-catalysed lactonisation of 3-(norborn-5-en-2-yl)propionic acid and 4-(norborn-5-en-2-yl)butyric acid affords 3-(2-exo-hydroxynorborn-2-endo-yl)propionic acid spiro-γ-lactone and 4-(2-exo-hydroxynorborn-2-endo-yl)butyric acid spiro-δ-lactone, resp