摘要:
The present invention discloses novel proinsulin glargine and a method for preparing insulin glargine therefrom, and belongs to the technical field of recombinant protein preparation. According to the present invention, a sequence of the proinsulin glargine containing SOD fusion peptide subjected to site-directed mutagenesis and "0 C peptide" is designed; recombinant Escherichia coli engineering bacteria for expressing insulin glargine are constructed; insulin glargine fusion protein in a form of an inclusion body is expressed by inducing the engineering bacteria; and denaturation, renaturation, modification, enzyme digestion, separation and purification are carried out to obtain a mature insulin glargine active pharmaceutical ingredient. According to the present invention, the SOD fusion peptide sequence is mutated to enhance the fermentation yield of the insulin glargine by 75%; and a "0 C peptide" strategy is adopted to avoid remaining of C-peptide residues and reduce the quality loss and miscleavage impurities in the enzyme digestion transformation. The purity of the insulin glargine active pharmaceutical ingredient prepared in the present invention is up to 99.9%, and the maximum single impurity content is controlled at 0.05%.
摘要:
A method of resolving a racemic mixture of (±)-Huperzine A to (−)-Huperzine A includes: separating the (−)-Huperzine A from the racemic mixture of (±)-Huperzine A by chiral high performance liquid chromatography (HPLC), the chiral HPLC being performed utilizing a mobile phase including a solution including an alcohol and one selected from dichloromethane, trichloromethane, and a mixture thereof, and the chiral HPLC being performed utilizing a chiral stationary phase including a polysaccharide derivative.
摘要:
A method of preparing a thioic acid intermediate of fluticasone propionate includes: treating a 17&bgr;-[(N,N-dimethyl carbamoyl)thio]carbonyl compound in a solution including an alcohol and an alkali metal hydroxide, an alkaline-earth metal hydroxide, or a mixture thereof to cleave an amide from the 17&bgr;-[(N,N-dimethyl carbamoyl)thio]carbonyl compound; treating the solution to separate an aqueous portion; and adding an acid to the aqueous portion to obtain the thioic acid intermediate of fluticasone propionate. A method of preparing fluticasone propionate includes preparing the thioic acid intermediate of fluticasone propionate, and alkylating the thioic acid intermediate of fluticasone propionate to prepare the fluticasone propionate.
摘要:
A method for the purification of idraparinux sodium includes: passing a solution including a crude idraparinux sodium through a column including a sodium ion exchange resin to obtain a first mixture; passing a solution including the first mixture through a gel chromatogaphy column to obtain a second mixture; and precipitating a purified idraparinux sodium from a solution including the second mixture.
摘要:
A method for the purification of idraparinux sodium includes: passing a solution including a crude idraparinux sodium through a column including a sodium ion exchange resin to obtain a first mixture; passing a solution including the first mixture through a gel chromatogaphy column to obtain a second mixture; and precipitating a purified idraparinux sodium from a solution including the second mixture.
摘要:
Provided in the present invention are a novel pro-insulin aspart structure design and a method for preparing insulin aspart. The main steps comprise designing the pro-insulin aspart sequence, constructing recombinant insulin aspart engineered bacteria, induing an insulin fusion protein expressed in the form of an inclusion body by means of the engineered bacteria, and obtaining a mature insulin aspart material drug by means of denaturing, renaturing enzymatic digestion, and separation purification, By means of changing the recombinant leading peptide and C-peptice sequences, the invention avoids the dangerous and tedious step of cleavage using cyanogen bromide. The C-peptide is shortened to one amino acid, reducing the quality loss of enzymatic digestion conversion.
摘要:
A method of preparing an intermediate of salmeterol (Compound 1, 2-amino-1-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)ethanol) includes: reacting compound 2 with 2-methoxypropene in a first organic solvent to produce a reaction solution including compound 3, compound 2 including a 2-bromo precursor of Compound 1; reacting compound 3 with a nitrogen source to produce compound 4; reacting compound 4 with sodium borohydride in a second organic solvent to produce compound 5; and debenzylating compound 5 by ammonium formate/palladium-carbon catalytic transfer hydrogenation in a third organic solvent to produce Compound 1. A method of preparing salmeterol includes preparing Compound 1, and reacting Compound 1 to prepare salmeterol.