129262-07-3

Basic information

• Product Name: (R,R)-KW 3049
• Synonyms: (R,R)-KW 3049;3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-, methyl (3R)-1-(phenylmethyl)-3-piperidinyl ester, monohydrochloride, (4R)-;3,5-Pyridinedicarboxylic acid, 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-, methyl 1-(phenylmethyl)-3-piperidinyl ester, monohydrochloride, [R-(R*,R*)]-;(-)-alfa-Benidipine Hydrochloride ((R,R)-Benidipine HCl);(-)-alfa-Benidipine-d5 Hydrochloride
• CAS NO: 129262-07-3
• Molecular Formula: C28H32ClN3O6
• Molecular Weight: 542.03
• Product Categories: Aromatics;Chiral Reagents;Heterocycles;Intermediates & Fine Chemicals;Pharmaceuticals;Aromatics, Chiral Reagents, Heterocycles, Pharmaceuticals, Intermediates & Fine Chemicals
• Mol File: 129262-07-3.mol

Chemical Properties

• Appearance: /
• CAS DataBase Reference: (R,R)-KW 3049(CAS DataBase Reference)
• NIST Chemistry Reference: (R,R)-KW 3049(129262-07-3)
• EPA Substance Registry System: (R,R)-KW 3049(129262-07-3)

Safety Data

• Hazardous Substances Data: 129262-07-3(Hazardous Substances Data)

Usage

Uses

The R-enantiomer

Upstream product

• 14813-01-5 1-benzyl-3-hydroxypiperidine 
• 74936-72-4 5-methoxycarbonyl-2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3-carboxylic acid 
• 100-44-7 benzyl chloride 
• 62214-78-2 1-benzyl-3-hydroxypyridin-1-ium bromide 
• 3323-73-7 1-Benzyl-3-hydroxypyridinium chloride 
• 100-39-0 benzyl bromide 
• 109-00-2 3-HYDROXYPYRIDINE 
• 39562-17-9 methyl 2-(3-nitrophenylmethylene)acetoacetate 
• 85387-34-4 1-benzylpiperidin-3-yl acetoacetate 
• 88712-56-5 1,4-dihydro-2,6-dimethyl-3-methoxycarbonyl-4-(3-nitrophenyl)-pyridine-5-carboxylic acid chloride 
• 99-61-6 3-nitro-benzaldehyde 
• 105-45-3 acetoacetic acid methyl ester 

Relevant articles and documents

Preparation method of benidipine hydrochloride

The invention belongs to the field of chemical synthesis of drugs, and particularly relates to a preparation method of a hypotensive drug benidipine hydrochloride. The method comprises the following steps: carrying out a Knoevenagel reaction, a Michael addition reaction, cyclization and hydrolysis on starting raw materials 3-nitrobenzaldehyde and methyl acetoacetate in the presence of a catalyst, reacting with thionyl chloride, directly reacting with 1-benzyl-3-hydroxypiperidine, and refining to obtain the benidipine hydrochloride. The benidipine hydrochloride obtained by adopting the preparation method of the benidipine hydrochloride is high in purity, column chromatography isolation is not needed, and the HPLC purity of the product is 99.5% or above. The yield of the obtained benidipine hydrochloride is relatively high and can reach 68% or above.

A benidipine hydrochloride method for synthesizing intermediate

The invention discloses a synthetic method for a benidipine hydrochloride intermediate. The synthetic method comprises performing a nucleophilic substitution reaction on 3-hydroxypyridine and a benzyl halide under a solvent refluxing condition, so as to generate 1-benzyl-3-hydroxypyridiniumhalide; taking an alcohol as a solvent and reducing 1-benzyl-3-hydroxypyridiniumhalide to generate 1-benzyl-3-piperidinol; then performing transesterification reaction on 1-benzyl-3-piperidinol and ethyl acetoacetate under a refluxing condition by taking toluene as a solvent in the presence/absence of a catalyst, and under the condition that less than 30% of the alcohol is left, performing normal-pressure distillation until the alcohol completely finishes reaction, so as to obtain the product. The synthetic method is simple and has the three-step total yield of 80% or more, and all employed materials are industrialized products and are cheap and easily obtained, and the quality is easily controlled.

BENIDIPINE HYDROCHLORIDE

Disclosed is a method for preparing benidipine hydrochloride, which comprising: 1) during the pre-treatment stage including acylchloridizing the main ring of dihydropyridine and then linking the side chain to synthesize directly benidipine hydrochloride, ultrasound technology is introduced, and the reactant material is dispersed and dissolved by untrasound to increase reaction rate; and/or 2) during the post-treatment stage, ultrasound technology is introduced and crude crystals or product obtained by heating to dryness of benidipine hydrochloride obtained via the method described above or any other synthetic routes is dissolved once more and then highly purified benidipine hydrochloride is obtained by untrasound.

Synthesis and pharmacological activity of stereoisomers of 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic acid methyl 1-(phenylmethyl)-3-piperidinyl ester

1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic acid methyl 1-(phenylmethyl)-3-piperidinyl ester 1, a highly potent calcium antagonist, was separated into stereo- and optical isomers to investigate the differences of antihypertensive activities between them. Fractional crystallization of the hydrochlorides of 1 gave α- and β-diasterioisomers. The α-isomer (benidipine hydrochloride, KW-3049) showed very strong hypotensive effect, but little activity was observed in the β-isomer. From optically resolved 1,4-dihydro-5-methoxycarbonyl-2,6-dimethyl-4-(3-nitrophenyl)-3-pyridi necarboxylic acids 2, and 1-benzyl-3-piperidinols 3, four optical isomers of 1 were synthesized, and their absolute configurations were deduced. The hypotensive activity of (+)-α, namely (S)-(S)-1, was 30 to 100 times stronger than that of (-)-α in intravenously administered spontaneously hypertensive rats.

1,4-Dihydropyridine derivatives

Compounds having coronary and vasodilator effects, a hypotensive effect, and useful as antianginal drugs and drugs for treating hypertension are represented by the following general formula: STR1 wherein R1 and R2 are the same or different groups and each represents a lower alkyl group, one of R3 and R4 represents a lower alkyl group and the other represents a group of the general formula: STR2 wherein R5 represents an aralkyl group or an acyl group and n represents 0 or an integer of 1-3; the pharmaceutically acceptable acid addition salts thereof are also effective therapeutic compounds.