1176895-65-0

Upstream product

• 209995-38-0 (2,4,5-trifluorophenyl)acetic acid 

Downstream Products

• 1172120-93-2 C₄₅H₄₃F₃N₂O₇ 
• 764667-64-3 5-(1-hydroxy-2-(2,4,5-trifluorophenyl)ethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione 
• 1152439-73-0 2,2-dimethyl-5-[2-(2,4,5-trifluorophenyl)acetyl]-[1,3]dioxane-4,6-dione 
• 1256815-03-8 4-(2,4,5-trifluorophenyl)-3-oxobutanoic acid 
• 764667-65-4 1-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-4-(2,4,5-trifluorophenyl)butane-1,3-dione 
• 769195-26-8 4-(2,4,5-trifluoro-phenyl)-3-oxo-butyric acid methyl ester 
• 1151240-88-8 3-oxo-4-(2,4,5-trifluorophenyl)-butyric acid ethyl ester 
• 936630-57-8 (R)-3-amino-4-phenyl(2,4,5-trifluorophenyl)butanoic acid 
• 486460-00-8 (3R)-3-[(1,1-dimethylethoxycarbonyl)amino]-4-(2,4,5-trifluorophenyl)butanoic acid 
• 209995-38-0 (2,4,5-trifluorophenyl)acetic acid 

Relevant academic research and scientific papers

Preparation method of 1-morpholinyl-4-(2,4,5-trifluorophenyl)butane-1,3-dione

The invention discloses a preparation method of 1-morpholinyl-4-(2,4,5-trifluorophenyl)butane-1,3-dione, and belongs to the technical field of organic synthesis. The preparation method comprises the following step: under the action of a metal chelating agent and an alkali, carrying out a reaction of the following formula on a compound 2 and a compound 3 in an organic solvent to obtain a compound 1. The preparation method disclosed by the invention is high in yield, simple in post-treatment, simple, feasible, mild in reaction condition and suitable for industrial production.

Preparation method of 1,3-dicarbonyl compound and intermediate of the 1,3-dicarbonyl compound

The invention discloses a preparation method of a 1,3-dicarbonyl compound and an intermediate of the 1,3-dicarbonyl compound, and particularly discloses a preparation method of a compound as shown ina formula I. The preparation method comprises the following step: in a solvent, performing an elimination reaction as shown in the specification on a compound as shown in a formula II to obtain the compound as shown in the formula I, wherein R is a tert-butoxy group, a methoxy group, an ethoxy group or a methyl group. The preparation method disclosed by the invention is relatively low in cost andbeneficial to industrial production.

Phosphonic acid analogs of fluorophenylalanines as inhibitors of human and porcine aminopeptidases N: Validation of the importance of the substitution of the aromatic ring

A library of phosphonic acid analogs of phenylalanine substituted with fluorine, chlorine and trifluoromethyl moieties on the aromatic ring was synthesized and evaluated for inhibitory activity against human (hAPN) and porcine (pAPN) aminopeptidases. Fluorogenic screening indicated that these analogs are micromolar or submicromolar inhibitors, both enzymes being more active against hAPN. In order to better understand the mode of the action of the most active compounds, molecular modeling was used. It confirmed that aminophosphonic portion of the enzyme is bound nearly identically in the case of all the studied compounds, whereas the difference in activity results from the placement of aromatic side chain of an inhibitor. Interestingly, both enantiomers of the individual compounds are usually bound quite similarly.

Synthesis method of sitagliptin

The invention discloses a synthetic method of sitagliptin. The synthesis method comprises the following steps of: carrying out a reaction on 1,3,5-trifluorophenylacetic acid as a raw material and pivaloyl chloride to convert into acyl chloride; under the

Preparation method of sitagliptin intermediate

The invention belongs to the field of pharmaceutical synthesis, and particularly relates to a preparation method of a sitagliptin intermediate. The preparation method includes the steps of 1) acylating chlorination reaction: enabling 2,4,5-trifluorophenylacetic acid to directly react with sulfoxide chloride to generate a compound II; 2) Grignard reagent preparation: adding a compound III and magnesium chips, and triggering with iodine to obtain a Grignard reagent compound IV; 3) Grignard reaction: taking cuprous iodide as a catalyst, subjecting the compound II and the Grignard reagent compound IV to Grignard reaction to generate the sitagliptin intermediate-a compound V. The preparation method of the sitagliptin intermediate is simple in synthetic route, capable of producing highly-pure product, high in yield, low in cost, mild in reaction conditions, and applicable to industrialized production.

PROCESS FOR PREPARATION OF (2R)-4-OXO-4-[3- (TRIFLUOROMETHYL)-5,6-DIHYDRO [1,2,4]-TRIAZOLO[4,3-A]PYRAZIN- 7(8H)-YL]-L-(2,4,5-TRIFLUOROPHENYL)BUTAN-2-AMINE and NEW IMPURITIES IN PREPARATION THEREOF

The present invention relates to synthesis of β-amino acid derivatives of formula (I) and its salts of formula (Ia) by a novel process. The process comprises the reduction of a protected or unprotected prochiral β-amino acrylic acid or derivative there of, by using borane containing reducing agents at atmospheric pressure. The resulting racemic β-amino compound is resolved to a pure stereoisomer of formula (I), specifically to (2R)-4-oxo-4-[3-Ctrifluoromethyl)-5,6-dihydrol[1,2,4]triazolo[4,3-alpyrazin-7(8H)-yl]-1-(2,4,4-trifluorophenyl)butan-2-amine. In an embodiment the invention disclosed polymorphic forms of formula (I), phosphate salt of formula (I) and also a Dibenzoyl-L-tartaric acid salt of formula (I).

IMPROVED PROCESS FOR PREPARATION OF (2R)-4-OXO-4-[3- (TRIFLUOROMETHYL)-5,6-DIHYDRO [1,2,4]-TRIAZOLO[4,3-A]PYRAZIN- 7(8H)-YL]-L-(2,4,5-TRIFLUOROPHENYL)BUTAN-2-AMINE and NEW IMPURITIES IN PREPARATION THEREOF

The present invention relates to synthesis of β-amino acid derivatives of formula (I) and its salts of formula (Ia) by a novel process. The process comprises the reduction of a protected or unprotected prochiral β-amino acrylic acid or derivative there of, by using borane containing reducing agents at atmospheric pressure. The resulting racemic β-amino compound is resolved to a pure stereoisomer of formula (I), specifically to (2R)-4-oxo-4- [3-Ctrifluoromethyl)-5, 6-dihydrol [1,2,4]triazolo [4,3-alpyrazin-7(8H)-yl]-1-(2,4,4-trifluorophenyl)butan-2-amine. In an embodiment the invention disclosed polymorphic forms of formula (I), phosphate salt of formula (I) and also a Dibenzoyl-L-tartaric acid salt of formula (I).

PROCESS FOR THE PREPARATION OF SITAGLIPTIN AND ITS INTERMEDIATES

The present invention relates to novel and improved processes for the preparation of Sitagliptin compound of formula (1) and its intermediates.

Synthesis, biological assay in vitro and molecular docking studies of new imidazopyrazinone derivatives as potential dipeptidyl peptidase IV inhibitors

A series of novel imidazopyrazinone derivatives were synthesized and evaluated with regard to their ability to inhibit dipeptidyl peptidase IV (DPP-IV) in vitro. Of these compounds (2R)-4-oxo-4-[2-(3-carbamoylbenzyl)- hexahydro-3-oxoimidazo [1,5-a]pyrazin-7(8H)-yl]-1-(2,4,5-trifluorophenyl)butan- 2-amine fumaric acid (17h, IC50 = 78 nM) was shown to effectively inhibit the activity of the dipeptidyl peptidase IV enzyme. Molecular docking studies were also performed to illustrate the binding mode of compounds 15c and 17h. Favorable interactions were identified from the binding of inhibitor 15c with DPP-IV. By analogy to the binding mode of compound 15c, it seems that the introduction of a substituted benzyl moiety onto the imidazopyrazinone could remarkably improve the inhibitory activity of compound 17h.