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:
The present disclosure describes a method of coupling a first compound to a second compound, the method comprising: providing the first compound having a fluorosulfonate substituent; providing the second compound comprising an alkene; and reacting the first compound and the second compound in a reaction mixture, the reaction mixture including a catalyst having at least one group 10 atom, the reaction mixture under conditions effective to couple the first compound to the second compound.
摘要:
A process to prepare a compound of Formula (I) wherein R 3 , R 4 and R 5 are each selected independently from hydrogen, halogen, alkyl, alkenyl, alkynyl, alkoxyl, and wherein the alkyl, alkenyl, alkynyl, and alkoxyl may be optionally substituted with one or more halogen, alkyl, alkenyl, alkynyl, and alkoxyl.
摘要:
The invention relates to highly enantioselective processes for the synthesis of chiral 1-alkanols via Zr-catalyzed asymmetric carboalumination of alkenes.
摘要:
Certain embodiments of the invention provide antioxidant-based diacids and polymers comprising glycol groups as described herein, and methods of use thereof. In certain embodiments the polymers described herein are formulated as microspheres or hydrogels. Described herein is the chemical incorporation of antioxidants, e.g., coumaric acid, ferulic acid, and sinapic acid, into a polymer backbone for use, e.g., in applications for localized release and rapid delivery. As provided, the chemical composition of the linker molecules used (of which hold together two bioactives via ester linkages) may be used to vary the hydrophilicity of the polymer. The bioactive release rate may also be altered for a tunable release delivery system, allowing for increased bioactive release compared to other linkers previously utilized.
摘要:
Present invention relates to an improved and commercial process for the preparation of 2-sustituted-2-(6-(substituted)-7-methylbenzo[d][1,3]dioxol-4-yl)acetic acid derivatives of formula-I [Formula should be inserted here], wherein R 1 is a O-protecting group such as methoxymethyl, ethoxymethyl, trialkylsilyl, arylmethyl, tetrahydropyran-2-yl, allyl; X is hydroxyl, halogen, mesylate, triflate, tosylate, acetate; Y is oxygen atom, NH or sulfur atom; R 2 is C 1 -C 6 alkyl. 2,4-Dihydroxy-3-methylbenzaldehyde is selectively protected at C-4 position in the form of an ether compound of formula-XII, oxidized the aldehyde function to get the diol of formula-XIII, and condensed with ethyl glyoxalate under Casiraghi reaction conditions to get the compound of formula-XV. Compound of formula-XV is converted to compound of formula-I by conventional chemistry. Compounds of formula-I are key intermediates in the synthesis of ecteinascidines like trabectedin
摘要:
The present invention provides compounds, and compositions comprising these compounds, which have immunomodulatory activity and/or anti-inflammatory activity.