摘要:
The present invention provides a method for producing an optically active N-(halopropyl)amino acid derivative, wherein the method comprises the steps of obtaining a compound represented by formula (III) by reacting an optically active alanine ester represented by formula (I) or a salt thereof (hereinafter sometimes simply referred to as an "alanine ester") with a halogenated propane represented by formula (II); and obtaining an optically active N-(halopropyl)amino acid derivative represented by formula (IV) by introducing a protecting group onto the nitrogen atom of the compound represented by formula (III). The present invention provides a method for efficiently producing an optically active N-(halopropyl)amino acid derivative.
摘要:
The invention relates to compounds of the formula I where the substituents AA1, AA2, o and R have a meaning indicated in claim 1, and to the salts and solvates and mixtures thereof, to a process for the preparation thereof, preparations and the use thereof.
摘要:
A method of manufacturing ammonium quat-containing raw material composition with improved transportation efficiency and/or processing properties is provided, including the step of forming a mixture containing the ammonium quat in a solvent that includes at least one glycol and at least one fatty alcohol, wherein said raw material composition has cationic activity of over 35%.
摘要:
The present invention relates to materials for extracting nucleic acid using charge switch methods which involve, at a first pH, bringing the sample into contact with a material which comprises an ionisable group, wherein the material has a positive charge at said first pH, such that nucleic acid is bound to the material; and releasing the nucleic acid at a second, higher, pH at which the charge on the material is negative, neutral or less positive. The release of the nucleic acid occurs under mild conditions and the ionisable group is provided by a biological buffer, a polyhydroxylated amine, a detergent or surfactant, a carbohydrate, a nucleic acid base, a heterocyclic nitrogen-containing compound, a monoamine, a biological dye, or a negatively ionisable group, the pKa of which is between about 3.0 and 7.0 and a metal oxide which is positively charged at said first pH, and optionally also at said second pH.
摘要:
The present invention relates to materials for extracting nucleic acid using charge switch methods which involve, at a first pH, bringing the sample into contact with a material which comprises an ionisable group, wherein the material has a positive charge at said first pH, such that nucleic acid is bound to the material; and releasing the nucleic acid at a second, higher, pH at which the charge on the material is negative, neutral or less positive. The release of the nucleic acid occurs under mild conditions and the ionisable group is provided by a biological buffer, a polyhydroxylated amine, a detergent or surfactant, a carbohydrate, a nucleic acid base, a heterocyclic nitrogen-containing compound, a monoamine, a biological dye, or a negatively ionisable group, the pKa of which is between about 3.0 and 7.0 and a metal oxide which is positively charged at said first pH, and optionally also at said second pH.
摘要:
A cationic amphiphile for facilitating transport of a biologically active molecule into a cell has the structure A-F-D, in which A is a lipid anchor, D is a head group, and F is a spacer group having the structure described herein. A method for facilitating transport of a biologically active molecule into a cell comprises preparing a lipid mixture comprising a cationic amphiphile having structure A-F-D-, preparing a lipoplex by contacting the lipid mixture with a biologically active molecule; and contacting the lipoplex with a cell, thereby facilitating transport of the biologically active molecule into the cell.