摘要:
In the present invention an amide represented by the general formula: is produced using a sulfonium salt represented by the general formula: as the starting material, to synthesizing a novel compound, i.e., an active ester represented by the general formula: and further reacting the active ester with a nucleophilic agent represented by the general formula: H-B-Y wherein R 1 represents a hydrogen, an alkyl group or a halogen group; R 2 and R 3 , which may be same or different, each represents an alkyl group; X- represents an anion typified by a halogen ion, a perchloric acid ion, a hydrogen sulfuric acid ion, a methylsulfuric acid ion, and a p-toluenesulfonic acid ion; W represents an alkyl group, alkoxy group group, in which R 4 . represents a halogen, a hydrogen or a methoxy or a Ci - C 5 alkyl group substituted with 1 - 3 halogen atoms, an aryl group or a fluorenylmethoxy group, or represents, together with W- C -, an amino acid, a peptide, or a protein group, in which the terminal amino group and the side chain group of the amino acid has or has not a protective group, B represents a substituted or not-substituted imino group, Y represents an organic group or B and Y join together to represent a heterocyclic amine. Alternatively H-BY represents an amino acid in which a proper protective group is or is not introduced into a-carboxyl group and/or side chain, or a peptide or protein in which a proper protective group is or is not introduced into the terminal carboxyl group and/or side chain.
摘要:
Verbessertes und vereinfachtes Verfahren zur Herstellung von Terephthalsäure-monoamid-Derivaten der Formel worin R Wasserstoff, ein Erdalkali- oder Alkalimetall-Kation oder Methyl, R1, C 6 -C 30 -Alkyl, vorzugsweise C 12 -C 22 -Alkyl und R 2 C 1 -C 30 -Alkyl und vorzugsweise Wasserstoff bedeutet, wobei man Dimethylterephthalat in Methanol und in Gegenwart von Natriummethylat mit einem Amin der Formel umsetzt. Die so erhaltenen Verbindungen werden eingesetzt zur Gelierung von Ölen und organischen Lösungsmitteln.
摘要翻译:改进和用于制备式对苯二甲酸单酰胺衍生物简化的工艺其中R是氢,碱土或碱金属阳离子或甲基,R C8-C30烷基,优选C12-C22烷基和R2 C1-C30, 烷基,优选氢,其中苯二甲酸二甲酯在甲醇中并在甲醇钠的存在下与式HNR 1 R 2的胺反应。 用于油和有机溶剂的凝胶化所获得的化合物。
摘要:
The ester process for synthesizing antioxidant amides through reaction of an aliphatic or aromatic ester of Formula (A) (FORMULA) with an aromatic amine of Formula (B) (FORMULA) in the presence of a base such as sodium methoxide, has been improved by a modification in the finishing procedure. The old steps of filtering the alkali metal salt reaction product, washing the filter cake, and hydrolyzing with dilute acid have been replaced by an in-situ hydrolysis of the reaction slurry with water. Several advantages are realized, among which are faster hydrolysis and easier filtration.
摘要:
A process for the preparation of aromatic amide antioxidants from a simple aliphatic or aromatic ester and primary amine in the presence of a metal alkoxide and an alcohol. Unsaturated products produced using this process are sufficiently pure to use as comonomers in the preparation of elastomers.
摘要:
a process for the preparation of amides or nitriles is provided. The process comprises carbonylating a nitrogen-containing compound of formula R 1 R 2 NH, C, to C 20 alkyl groups and C, to C 20 aryl groups, using a Group VIII noble metal catalyst, a halide-containing promoter and an acid. Examples of the Group VIII noble metals which can be used as catalysts are rhodium and iridium.
摘要:
A process for preparing an N ω -trifluoroacetyl amino acid which comprises reacting a trifluoroacetic acid ester with a basic amino acid in an aqueous medium under an alkali condition. According to the process, N ω -trifluoroacetyl amino acid, particularly N ω -trifluoroacetyl derivatives of lysine and ornithine, can be economically, easily and efficiently prepared in industrial scale.
摘要:
Die Erfindung betrifft ein Verfahren zur Herstellung von N-(tert.Aminoalkyl)acrylamiden durch Umsetzung von Acrylsäure mit einem entsprechenden tertiären Aminoalkylamin bei einer Temperatur von 150 bis 230°C. Die Umsetzung von Aminoalkylamin und Acrylsäure wird in äquimolaren Mengen und bevorzugt in Gegenwart eines sauren oder basischen Katalysators durchgeführt.