- N-Methyl-DL-aspartic acid monohydrate
-
The title compound, C5H9NO4·H2O, has been synthesized and crystallized. It crystallizes in Cc with one molecule in the asymmetric unit. The compound is found in its zwitterionic form. D and L forms of the compou
- Madsen, Dennis,Pattison, Philip
-
-
Read Online
- METHOD FOR PREPARING AMIDE
-
The present invention provides a method for preparing amides, in which an amino acid ionic liquid is used as both a reaction medium and a catalyst to catalyze Beckman rearrangement of a ketoxime, so as to produce an amide. In the method, the rearrangement is conducted by catalyzing a ketoxime with an amino acid ionic liquid having the asymmetric property at a moderate reaction temperature during a short reaction time, so as to produce an amide without adding other catalysts such as concentrate sulfuric acid. The method has advantages such as avoiding corrosion in equipments with pipelines, the high conversion rate of ketoximes and the high selectivity of amides.
- -
-
Page/Page column 3
(2010/04/23)
-
- Zwitterionic monomer having amino-multicarboxylic acid functionality
-
A zwitterionic monomer having amino-multicarboxylic acid functionality having Structure (I) wherein R1is selected from the group consisting of H, an alkyl group having 1 to 6 carbon atoms; R2is (CH2)nwhere n is 2 to 12; R3and R4are independently an alkyl group having 1 to 6 carbon atoms; R5is (CH2)mwhere m is 2 or 3; R6and R7are independently selected from wherein R20is selected from the group consisting of H, CH3, and COOY; R21is selected from H or CH3; X is oxygen or nitrogen; A is a halide; and Y is independently a cation. The zwitterionic monomer is the reaction product of an amino-multicarboxylic acid and an amine containing monomer. Polymers prepared with the zwitterionic monomer are especially useful in hair treatment compositions to provide increased stiffness to hair, in coating formulations to increase the impact resistance, wet adhesion, and flexibility of the coating, especially wood coatings, and in mortar compositions to improve mortar compatibility, especially with redispersible powders.
- -
-
-
- Substituted quinoxaline-2-ones as glutamate receptor antagonists
-
A novel series of substituted quinoxaline 2-ones useful as neuroprotective agents are taught. Novel intermediates, processes of preparation, and pharmaceutical compositions containing the compounds are also taught. The compounds are glutamate receptor antagonists and are useful in the treatment of stroke, cerebral ischemia, or cerebral infarction resulting from thromboembolic or hemorrhagic stroke, cerebral vasospasms, hypoglycemia, cardiac arrest, status epilepticus, perinatal asphyxia, anoxia, seizure disorders, pain, Alzheimer's, Parkinson's, and Huntington's Diseases.
- -
-
-
- Starches modified with amino-multicarboxylates
-
Amino-multicarboxylate starch ether derivatives are provided having the following structure: wherein, St-O represents a starch molecule, R is H or CH3;, R' is H, CH3 or COOH;, M is a cation;, n is 2 or 3; and, R'' is H or alkyl of 1 to 18 carbon atoms., These starch derivatives are particularly useful as retention and strength aids in papermaking.
- -
-
-
