摘要:
The present invention relates to a process for preparing ethylenediamine (EDA), where the process comprises the steps a) to c). In step a), formaldehyde is reacted with hydrocyanic acid (HCN) to form formaldehyde cyanohydrin (FACH), where the hydrocyanic acid is completely free or largely free of sulfur dioxide (SO2). The FACH prepared in this way is reacted with ammonia (NH3) to form aminoacetonitrile (AAN) in step b), whereupon a hydrogenation of AAN in the presence of a catalyst to form EDA is carried out in step c).
摘要:
Cure accelerators for anaerobic curable compositions, such as adhesives and sealants, are provided, and which are defined with reference to the compounds shown in structure I where A is CH2 or benzyl, R is C1-10 alkyl, R′ is H or C1-10 alkyl, or R and R′ taken together may form a four to seven membered ring fused to the benzene ring, R″ is optional, but when R″ is present, R″ is halogen, alkyl, alkenyl, cycloalkyl, hydroxyalkyl, hydroxyalkenyl, alkoxy, amino, alkylene- or alkenylene-ether, alkylene (meth)acrylate, carbonyl, carboxyl, nitroso, sulfonate, hydroxyl or haloalkyl, and EWG is as shown, an electron withdrawing group, such as nitro, nitrile, carboxylate or trihaloalkyl.
摘要:
The invention relates to new compounds of the formula I to their use as medicaments, to methods for their therapeutic use and to pharmaceutical compositions containing them.
摘要:
A process for preparing TETA and/or DETA by hydrogenating EDDN and/or EDMN with hydrogen in the presence of a catalyst, which comprises preparing EDDN and/or EDMN from FA, HCN and EDA in the presence of toluene as a solvent and performing the hydrogenation in suspension mode in the presence of THF.
摘要:
A process for preparing EDDN and/or EDMN by conversion of FA, HCN and EDA, the reaction being effected in the presence of water, and, after the conversion, water being depleted from the reaction mixture in a distillation column, which comprises performing the distillation in the presence of an organic solvent which has a boiling point between water and EDDN and/or EDMN at the distillation pressure existing in the column or which forms a low-boiling azeotrope with water.
摘要:
The present invention relates to an alkalimetal salt of glutamic acid-N,N-diacetic acid (GLDA) of the formula NaxKyHzGLDA, wherein x is equal to or more than 2 and lower than 4 and y is more than 0 and equal to or lower than 2, x+y is 3.5-4, and x+y+z=4, to processes to prepare such salt and the use thereof.
摘要翻译:本发明涉及式NaxKyHzGLDA的谷氨酸-N,N-二乙酸(GLDA)的碱金属盐,其中x等于或大于2且低于4且y大于0且等于或低于 2,x + y为3.5-4,x + y + z = 4,以制备这种盐及其用途。
摘要:
This invention relates to a novel class of compounds which are cysteine protease inhibitors, including but not limited to, inhibitors of cathepsins K, L, S and B. These compounds are useful for treating diseases in which inhibition of bone resorption is indicated, such as osteoporosis.
摘要:
The present invention relates to a process comprising the reaction of a cyanide with an amino acid and an aldehyde, characterized in that the cyanide is a cyanide salt, the amino acid is aspartic acid and/or glutamic acid in the acidic form, and the process is performed under acidic pH by the addition of between 0 and 1 equivalent of an acid based on the amount of aspartic or glutamic acid.
摘要:
A process for preparing a diaminoacetonitrile which includes reacting by contacting an amine comprising two primary amine groups with a cyanohydrin. The diaminoacetonitrile produced may subsequently be used in the production of polymers and/or as a curing agent for epoxy resins.
摘要:
The present invention relates to an alkalimetal salt of glutamic acid-N,N-diacetic acid (GLDA) of the formula NaxKyHzGLDA, wherein x is equal to or more than 2 and lower than 4 and y is more than 0 and equal to or lower than 2, x+y is 3.5-4, and x+y+z=4, to processes to prepare such salt and the use thereof.
摘要翻译:本发明涉及式NaxKyHzGLDA的谷氨酸-N,N-二乙酸(GLDA)的碱金属盐,其中x等于或大于2且低于4且y大于0且等于或低于 2,x + y为3.5-4,x + y + z = 4,以制备这种盐及其用途。