摘要:
La présente invention concerne un procédé d'hydrocyanation de composés organiques à insaturation éthylénique en composés comprenant au moins une fonction nitrile. La présente invention propose un procédé d'hydrocyanation d'un composé hydrocarboné comprenant au moins une insaturation éthylénique par réaction en milieu liquide avec le cyanure d'hydrogène en présence d'un catalyseur comprenant un élément métallique choisi parmi les métaux de transition et un ligand organophosphoré comprenant, dans un mode de réalisation de l'invention, un composé organophosphoré de formule (I) dans lesquelles : - R 1 , R 2 , R 3 , R 4 identiques ou différents représentent un atome d'hydrogène, un radical alkyl linéaire ou ramifié ayant de 1 à douze atomes de carbone pouvant contenir des hétéroatomes, un radical comprenant un radical aromatique ou cycloaliphatique substitué ou non pouvant comprendre des hétéroatomes, un radical carbonyle, alcoxycarbonyle ou alcoxy, un atome d'halogène, un groupement nitrile ou un groupement halogénoalkyle ayant 1 à 12 atomes de carbone -X représente un atome d'halogène choisi dans le groupe comprenant le fluor et le brome, La présente invention est notamment utile pour la synthèse de l'adiponitrile à partir du butadiène.
摘要:
Provided herein are methods and compositions for determining whether a patient suffers from systemic amyloidosis, comprising detecting the presence of a misfolded or aggregated protein in a tissue of the patient, wherein the detecting comprises contacting the misfolded or aggregated transthyretin protein with a compound described herein. In some embodiments, the misfolded or aggregated protein is transthyretin.
摘要:
Disclosed herein are compounds and methods of using such compounds for treating or suppressing oxidative stress disorders, including mitochondrial disorders, impaired energy processing disorders, neurodegenerative diseases and diseases of aging, or for modulating one or more energy biomarkers, normalizing one or more energy biomarkers, or enhancing one or more energy biomarkers, wherein the compound is a compound of Formula I or Formula II: wherein: R 1 and R 2 are independently hydrogen,(C 1 -C 6 )alkyl or -O(C 1 -C 6 )alkyl; or R 1 and R 2 together represent -CH=CH-CH=CH-; R 3 is (C1-C6)alkyl; X is -CH=CH- or -C≡C-; m is 1- 10; n is 1-5; k is 1-3, with the proviso that when k is an integer of 2 or 3, n is independently 1-5 in each occurrence of the -X-(CH 2 ) n - group; Y is -OR 4 , -CN, -C(=0)OR 5 , -C(=0)R 5 , or - C(=0)N(R 6 ) 2 ; R 4 and R 5 are independently selected from the group consisting of hydrogen, -(C 1 - C 6 )alkyl, -(C 1 -C 6 )haloalkyl, -C(=0)-(C 1 -C 6 )alkyl, -C(=0)-(C 1 -C 6 )haloalkyl, -C(=0)-NH(C 1 - C 6 )alkyl, -C(=0)-N((C 1 -C 6 )alkyl) 2 , -C(=0)-NH 2 , and phenyl, wherein the phenyl group may optionally be substituted with a substituent selected from the group consisting of -(C 1 - C 6 )alkyl, -0-(C 1 -C 6 )alkyl, -(C 1 -C 6 )haloalkyl, and halo; each R 6 is independently hydrogen or -(C 1 -C 6 )alkyl; and M is -H, -C(0)-R 7 or -C(0)0-R 7 , wherein R 7 is -(C 1 -C 6 )alkyl or phenyl; or a stereoisomer, mixture of stereoisomers, pharmaceutically acceptable salt, crystalline form, non-crystalline form, hydrate or solvate thereof.
摘要:
A compound or a mixture of compounds comprising an aromachemical compound of the formula: NC-C(R2)2-0-R1 wherein: Rl is straight or branched chain alkyl, alkenyl having 1-16 carbon atoms, aryl, aralkyl, alkaryl, thiophenyl or substituted derivatives thereof; R2 is R1 or H, with. the proviso that at least one of said R2 is R1 as well as compositions, products, preparations or articles having improved aroma, fragrance or odor characteristics containing as active ingredient such compound or mixture of compounds.
摘要:
The invention concerns a method for making a catalyst for hydrocyanation of an ethylenically unsaturated organic compound. More particularly it concerns a method for making a hydrocyanation catalyst comprising in particular nickel and a water-soluble phosphine. The method for making a catalyst for hydrocyanation of an organic compound consisting of an aqueous solution of at least a water-soluble phosphine and nickel, consists in: contacting an aqueous solution of a water-soluble phosphine and a nickel hydroxide; adding in the medium hydrogen cyanide or a compound generating hydrogen cyanide and in maintaining the medium under agitation until the nickel is dissolved; then in subjecting the medium to reduction to transform at least partly the dissolved nickel with an oxidation number of zero. The catalyst is useful in organic reactions catalysed by a two-phase system, such as hydrocyanation of unsaturated organic compounds.
摘要:
This disclosure generally relates to methods of making ibuprofen, naproxen, and derivatives thereof. This disclosure also generally relates to compounds made by the disclosed methods. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
摘要:
Methods and systems for purifying an acetonitrile waste stream and methods for synthesizing an oligonucleotide using a purified acetonitrile waste stream are provided. An exemplary method for purifying an acetonitrile waste stream includes providing an acetonitrile waste stream and fractionating the acetonitrile waste stream to produce a single overhead fraction. The method includes condensing the single overhead fraction to produce a condensed single overhead fraction and contacting the condensed single overhead fraction with an adsorbent to produce an acetonitrile stream that comprises an amount of at least one impurity that is reduced relative to the acetonitrile waste stream.