摘要:
A platform drug delivery system and a method of improving the delivery of low solubility pharmaceuticals utilizing crystal engineering and Theanine dissolution resulting in enhanced bioactivity, dissolution rate, and solid state stability.
摘要:
The present invention relates to a method of reacting starting materials with an activating group, namely alkanes carrying a leaving group and/or olefins, with carbon dioxide under transition metal catalysis to give carboxyl group-containing products. It is a special feature of the method of the present invention that the carboxylation predominantly takes place at a preferred position of the molecule irrespective of the position of the activating group. The carboxylation position is either an aliphatic terminus of the molecule or it is a carbon atom adjacent to a carbon carrying an electron withdrawing group. The course of the reaction can be controlled by appropriately choosing the reaction conditions to yield the desired regioisomer.
摘要:
The present invention relates to substituted aromatic compounds for use in prevention or treatment of various fibrotic diseases and conditions in subjects, including pulmonary fibrosis, liver fibrosis, skin fibrosis and cardiac fibrosis, where the compound has the following formula: or a pharmaceutically acceptable salt thereof, wherein A is C5 alkyl, C6 alkyl, C5 alkenyl, C6 alkenyl, C(O)—(CH2)n—CH3 or CH(OH)—(CH2)n—CH3 wherein n is 3 or 4; R1 is H, OH or F; R2 is H, OH, F or CH2—OH; R3 is H, OH, F or CH2Ph; R4 is H, OH or F; Q is 1) (CH2)mC(O)OH wherein m is 1 or 2, 2) CH(CH3)C(O)OH, 3) C(CH3)2C(O)OH, 4) CH(F)—C(O)OH, 5) CF2—C(O)OH, or 6) C(O)—C(O)OH.
摘要:
The inventive concepts disclosed and/or claimed herein relate generally to catalysts and, more particularly, but not by way of limitation, to a heterogeneous, metal-free hydrogenation catalyst containing frustrated Lewis pairs. In one non-limiting embodiment, the heterogeneous, metal-free catalyst comprises hexagonal boron nitride (h-BN) having frustrated Lewis pairs therein.
摘要:
The present invention relates to a spirobenzylamine-phosphine, preparation method therefor and use thereof. The compound has a structure represented by formula (I), wherein n=0 to 3; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 and R 9 having a value as defined in claim 1. Starting from the substituted 7-trifluoromesyloxy-7'-diarylphosphino-1, 1'-spiro-dihydroindene, the compound is synthesized in a two-step or three-step reactions. The new spirobenzylamine-phosphine is complexed with an iridium precursor and is subjected to ion exchange, to give an Iridium/spirobenzylamine-phosphine complex comprising various anions. The spiro benzyl amine-phosphine/Iridium complex according to the present invention may be used for catalyzing asymmetry hydrogenation of a variety of alpha-substituted acrylic acids, has high activity and enantio-selectivity, and has a good prospect of industrialization.
摘要:
The present invention relates to a spirobenzylamine-phosphine, preparation method therefor and use thereof. The compound has a structure represented by formula (I), wherein n=0 to 3; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 and R 9 having a value as defined in claim 1. Starting from the substituted 7-trifluoromesyloxy-7'-diarylphosphino-1, 1'-spiro-dihydroindene, the compound is synthesized in a two-step or three-step reactions. The new spirobenzylamine-phosphine is complexed with an iridium precursor and is subjected to ion exchange, to give an Iridium/spirobenzylamine-phosphine complex comprising various anions. The spiro benzyl amine-phosphine/Iridium complex according to the present invention may be used for catalyzing asymmetry hydrogenation of a variety of alpha-substituted acrylic acids, has high activity and enantio-selectivity, and has a good prospect of industrialization.
摘要:
The invention relates to a continuous method for the carbonylation of an (R 1 R 3 )C - X alcohol in acid, where: R 1 and R 3 are radicals bonded to the carbon atom by means of a single covalent bond, or an aliphatic cyclic compound that integrates the central carbon atom and bonds to the latter on each side by means of a single covalent bond; and C - X is C(R) - OH, where R is (Z 1 Z 2 )HC- or (Z 1 Z 2 )C-, it being a given that said radical (Z 1 Z 2 )C- can be a substituted or unsubstituted unsaturated cyclic compound such as a benzene cyclic compound. Said method is carried out in a piston reactor provided with a mechanical axial agitation means, and in said method: a) at least one liquid phase comprising said raw alcohol is continuously added, optionally into an appropriate solvent, and a strong acid is also continuously added; b) said at least one liquid phase is subjected to mechanically axially agitated under the influence of a CO pressure of 2 to 250 bar during a transit time t of between 10 seconds and 10 minutes; and c) the liquid phase is removed from said reactor, and in said method, the temperature increase ΔT of the liquid, between the input thereof and removal thereof in/from the reactor, is controlled such that the ratio ΔΤ/AT ad (where AT ad is the adiabatic temperature increase) is between 0.02 and 0.6 when the ratio between the characteristic heat transfer time t therm and the characteristic matter transfer time t mat is between 1 and 50.
摘要:
The present invention relates to novel Ruthenium catalysts and related borohydride complexes, and the use of such catalysts, inter alia, for (1) hydrogenation of amides (including polyamides) to alcohols and amines; (2) preparing amides from alcohols with amines (including the preparation of polyamides (e.g., polypeptides) by reacting dialcohols and diamines and/or by polymerization of amino alcohols); (3) hydrogenation of esters to alcohols (including hydrogenation of cyclic esters (lactones) or cyclic di-esters (di-lactones) or polyesters); (4) hydrogenation of organic carbonates (including polycarbonates) to alcohols and hydrogenation of carbamates (including polycarbamates) or urea derivatives to alcohols and amines; (5) dehydrogenative coupling of alcohols to esters; (6) hydrogenation of secondary alcohols to ketones; (7) amidation of esters (i.e., synthesis of amides from esters and amines); (8) acylation of alcohols using esters; (9) coupling of alcohols with water to form carboxylic acids; and (10) dehydrogenation of beta-amino alcohols to form pyrazines. The present invention further relates to the novel uses of certain pyridine Ruthenium catalysts.