摘要:
The invention includes methods and materials for forming and manipulating aromatic-based polymers and copolymers using biomass compounds as starting materials. Embodiments of the invention can be used in processes designed to replace those used in the petrochemical industry. Typical embodiments of the invention include methods and materials for forming and/or modifying compounds including dicarboxylic acid ester dimers, benzoxazines and dicarboxylic acid ether dimers. Embodiments of the invention further provide methods and materials for utilizing these compounds to form commercially desirable polymers having structures and physical properties akin to those found in polymers formed from petroleum products.
摘要:
Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful intermediates and products, such as hydroxy-carboxylic acids and hydroxy-carboxylic acid derivatives. A method includes treating a reduced recalcitrance lignocellulosic or cellulosic material with one or more enzymes and/or organisms (such as lactobacillus, Pediococcus, Rhizopus, Enterococcus) to produce an alpha, beta, gamma and/or delta hydroxycarboxylic acid (such as lactic acid, glycolic acid); and converting the alpha, beta, gamma and/or delta hydroxy-carboxylic acid to the product (such as esters, polymers, and copolymers).
摘要:
The present invention is related to a new process for the preparation of 4-methyloxazole-5-carboxylic ester, which is a valuable intermediate in the synthesis of pyridoxine (vitamin B 6 ). The present invention is also related to a new intermediate for the preparation of 4-methyloxazole-5-carboxylic ester and processes for the preparation thereof.
摘要:
Novel synthetic routes, which are highly applicable for industrial preparation of therapeutically beneficial oxidized phospholipids are disclosed. Particularly, novel methods for efficiently preparing compounds having a glycerolic backbone and one or more oxidized moieties attached to the glycerolic backbone, which are devoid of column chromatography are disclosed. Further disclosed are novel methods of introducing phosphorous-containing moieties such as phosphate moieties to compounds having glycerolic backbone and intermediates formed thereby.
摘要:
Novel synthetic routes, which are highly applicable for industrial preparation of therapeutically beneficial oxidized phospholipids are disclosed. Particularly, novel methods for efficiently preparing compounds having a glycerolic backbone and one or more oxidized moieties attached to the glycerolic backbone, which are devoid of column chromatography are disclosed. Further disclosed are novel methods of introducing phosphorous-containing moieties such as phosphate moieties to compounds having glycerolic backbone and intermediates formed thereby.
摘要:
L'invention concerne un procédé de préparation d'un sel d'acide acétylsalicylique et d'un acide aminé basique, comprenant le mélange dans un réacteur d'une solution d'acide acétylsalicylique et d'une solution dudit acide aminé basique, à une température inférieure ou égale à 30 °C à pression atmosphérique. Ce mélange est réalisé par introduction progressive dans le réacteur, simultanément, de quantités instantanées équimolaires d'acide acétylsalicylique et de l'acide aminé basique.
摘要:
Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful intermediates and products, such as hydroxy-carboxylic acids and hydroxy-carboxylic acid derivatives.
摘要:
The present invention relates to novel carboxylic acid-substituted idebenone derivatives, skin treatment compositions containing these carboxylic acid-substituted idebenone derivatives, methods of treating skin changes by topical application of these carboxylic acid-substituted idebenone derivatives, and their methods of synthesis. The carboxylic acid-substituted idebenone derivatives of the present invention are unexpectedly effective in treating skin, particularly with respect to skin tolerance. When included in a topical composition, the carboxylic acid-substituted idebenone derivatives of the present invention have an antioxidant effect that is useful in treating a skin change.
摘要:
The present invention is concerned with a novel process for the manufacture of 4alkanoyloxy-2,3,5-trimethylphenyI (E/ Z )-phytyl ethers, precursors of α.-tocopheryl alkanoates, by cross-metathesis reaction of alkenyl ethers of 1-alkanoyloxy-2,3,6-trimethylhydroquinone with 2,6,10,14-tetramethylpentadecene or a phytol derivative, e.g. an ester, an ether or a silyl ether, in the presence of a cross-metathesis catalyst. As the crossmetathesis catalyst especially ruthenium metal carbene complexes are suitable which possess (a) ruthenium metal center(s), have an electron count of 16 or 18 and are penta- or hexa- coordinated. A further object of the invention is a process for the manufacture of αtocopheryl alkanoates comprising this reaction.