摘要:
The invention relates to hydroxybenzophenone-based compounds of formula (I) that are used to improve UV, thermal, and thereto-oxidative stability of high performance aromatic polymers in a blend or as end-cappers of the same polymers.
摘要:
Provided herein are new processes for the preparation of aminosulfone intermediates for the synthesis of 2- [1-(3-ethoxy-4-methoxyphenyl)-2-methylsulfonylethyl] -4-acetylaminoisoindoline-1,3-dione, which is useful for preventing or treating diseases or conditions related to an abnormally high level or activity of TNF-a. Further provided herein are processes for the commercial production of (S)-1-(3-ethoxy-4-methoxyphenyl)-2-methanesulfonylethylamine.
摘要:
A preparative method for carboxylic acids is disclosed in the present invention. The method is characterized in that: compounds (II) are reacted in the presence of hydrogen peroxide and base to produce target products (I), as represented by the following reaction scheme: wherein R 1 is aryl, pyridyl, pyrimidyl, pyridazinyl, pyrazinyl, benzothienyl, benzofuranyl, quinolinyl, isoquinolinyl, thiadiazolyl, C 1-6 alkyl, C 3-6 cycloalkyl, C 2-6 alkenyl, C 2-6 alkynyl and hydrogen; R 2 is alkoxycarbonyl, alkylaminocarbonyl, aminocarbonyl, alkylthiolcarbonyl, cyano, sulfonyl, sulfinyl, carbonyl, aldehyde, carboxyl, nitro, alkyl and hydrogen; R 3 is alkoxycarbonyl, alkyl amido carbonyl, aminocarbonyl, cyano, sulfonyl, sulfinyl, carbonyl, carboxyl and nitro. The present invention has the following main benefits: cheap and readily available starting materials, safe processes, high yield, good quality, which facilitates industrial production.
摘要:
The present invention relates to a one pot single step process for the synthesis of a compound containing a sulfonyl functional group, in particular a sulfone or a sulfonamide, comprising the step of mixing together a silane, an SO 2 source, an electrophilic compound, an activating compound and optionally a metal catalyst. Labeled compounds containing a sulfonyl functional group, in particular labeled sulfones or sulfonamides can also be synthesized by the process of the invention. The present invention also concerns the use of unlabeled or labeled sulfonyl containing compounds, in particular labeled or unlabeled sulfones and sulfonamides, obtained by a process according to the invention in the manufacture of vitamins, pharmaceuticals, adhesives, acrylic fibers and synthetic leathers, pesticides, and fertilizers, for example. The present invention further relates to a process for producing tracers and tracers comprising a step of synthesis of a labeled sulfonyl containing compounds, in particular labeled sulfones and sulfonamides, obtained by a process according to the invention.