Abstract:
Disclosed embodiments relate to improved methods for the synthesis of activated fumarate intermediates and their use in chemical synthesis. Disclosed embodiments describe the synthesis of activated fumarate esters including those derived from activating groups including: 4-nitrophenyl, diphenylphosphoryl azide, pivaloyl chloride, chlorosulfonyl isocyanate, p-nitrophenol, MEF, trifluoroacetyl and chlorine, for example, ethyl fumaroyl chloride and the subsequent use of the activated ester in situ. Further embodiments describe the improved synthesis of substituted aminoalkyl-diketopiperazines from unisolated and unpurified intermediates allowing for improved yields and reactor throughput.
Abstract:
Phenoxy carboxylic acid compounds and compositions for the delivery of active agents are provided. Methods of administration and preparation are provided as well.
Abstract:
Compositions of precipitated cationic polymers containing mixtures of certain salts as well as processes for making and using the same are disclosed.
Abstract:
Phenoxy carboxylic acid compounds and compositions for the delivery of active agents are provided. Methods of administration and preparation are provided as well.
Abstract:
Amino acid derivative as carrier compounds and compositions which are useful in the delivery of active agents are provided. The active agents can be a peptide, mucopolysaccharide, carbohydrate, or lipid. Methods of administration, including oral administration, and preparation are provided as well.
Abstract:
Compositions of precipitated cationic polymers containing mixtures of certain salts as well as processes for making and using the same are disclosed.
Abstract:
Compositions of precipitated anionic polymers containing mixtures of cationic organic salts and kosmotropic salts as well as processes for making and using the same to condition soil are disclosed.
Abstract:
Compositions of precipitated cationic polymers containing mixtures of certain salts as well as processes for making and using the same are disclosed.
Abstract:
Compositions of precipitated anionic polymers containing mixtures of certain salts as well as processes for making and using the same are disclosed.
Abstract:
A method of preparing a fibrous activated carbon including the steps of carbonizing and activating cellulose fibre at temperatures between 200.degree. C. and 1000.degree. C. in an inert atmosphere, characterized in that, prior to activation, the fibre is impregnated with an impregnating material comprising, in the form of one or more compounds, boron and at least one alkali metal.