ES2055654B1 - PROCEDURE FOR OBTAINING 2,6-DIMETIL-4- (3-NITROFENIL) -1,4-DIHIDROPIRIDIN-3,5-DICARBOXILATO DE 3-ETIL-5-METHYL. - Google Patents

PROCEDURE FOR OBTAINING 2,6-DIMETIL-4- (3-NITROFENIL) -1,4-DIHIDROPIRIDIN-3,5-DICARBOXILATO DE 3-ETIL-5-METHYL.

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Publication number
ES2055654B1
ES2055654B1 ES9201892A ES9201892A ES2055654B1 ES 2055654 B1 ES2055654 B1 ES 2055654B1 ES 9201892 A ES9201892 A ES 9201892A ES 9201892 A ES9201892 A ES 9201892A ES 2055654 B1 ES2055654 B1 ES 2055654B1
Authority
ES
Spain
Prior art keywords
obtaining
procedure
dihidropiridin
dicarboxilato
etil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
ES9201892A
Other languages
Spanish (es)
Other versions
ES2055654A1 (en
Inventor
Garcia Carolina Burgos
Ceinos M Luisa Izquierdo
Navio Jose Luis Garcia
Lopez Juan Jose Vaquero
Gomez Julio Alvarez-Builla
Robisco Jose Luis Novella
Arinero Jose Calatayud
Jimenez Antonio F Montoro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BYK LEO LABORATORIO FARMACEUTICO, S.L.
Original Assignee
ELMUQUIMICA FARM SL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ELMUQUIMICA FARM SL filed Critical ELMUQUIMICA FARM SL
Priority to ES9201892A priority Critical patent/ES2055654B1/en
Publication of ES2055654A1 publication Critical patent/ES2055654A1/en
Application granted granted Critical
Publication of ES2055654B1 publication Critical patent/ES2055654B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Hydrogenated Pyridines (AREA)

Abstract

NUEVO PROCEDIMIENTO DE OBTENCION DE 2,6-DIMETIL-4-(3''-NITROFENIL) -1,4-DIHIDROPIRIDIN-3,5-DICARBOXILATO DE 3-ETIL-5-METIL, VERIFICADO EN DOS PASOS. OBTENCION DE 2-(3''-NITRO) BENCILIDENACETOACETATO DE ETILO A PARTIR DE 3-NITROBENZALDEHIDO Y ACETOACETATO DE ETILO EN PRESENCIA DE PIPERIDINA, ACIDO ACETICO GLACIAL E ISOPROPANOL, UN SEGUNDO PASO DONDE EL PRODUCTO ANTERIOR ES TRATADO CON 3-AMINOCROTONATO DE METILO EN PRESENCIA DE ALUMINA ACTIVADA, PARA RENDIR EL PRODUCTO TITULADO. VENTAJAS QUE SE OBTIENEN MEDIANTE ESTE PROCEDIMIENTO EN RELACION AL ESTADO ANTERIOR DE LA TECNICA: A) PROCESOS REALIZADOS EN CONDICIONES RAPIDAS, SUAVES Y SENCILLAS OBTENIENDOSE PRODUCTOS DE ALTA CALIDAD. B) EL ULTIMO PASO SE REALIZA EN FASE SOLIDA, EVITANDO TRAZAS DE DIHIDROPIRIDINAS SIMETRICAS. C) OBTENCION DE LA DIHIDROPIRIDINA SIN DISOLVENTE, MINIMA PRODUCCION DE EFLUENTES CONTAMINANTES. D) UTILIZACION DE CATALIZADORES BASICOS O ACIDOS RECICLABLES. E) BAJO COSTO EN LOS PROCESOS, MINIMIZACION DE REACTIVOS Y RESIDUOS.F) BAJO IMPACTO AMBIENTAL.NEW PROCEDURE FOR OBTAINING 2,6-DIMETHYL-4- (3 '' - NITROPHENIL) -1,4-DIHIDROPIRIDIN-3,5-DICARBOXILATO DE 3-ETIL-5-METHYL, VERIFIED IN TWO STEPS. OBTAINING OF 2- (3 '' - NITRO) ETHYL BENZYLIDENACETOACETATE FROM 3-NITROBENZALDEHYDE AND ETHYL ACETOACETATE IN THE PRESENCE OF PIPERIDINE, GLACIAL ACETIC ACID, AND AROPYANE, AROUND 3-ELATE IN THE PRESENCE OF ACTIVATED ALUMINA, TO YIELD THE TITLED PRODUCT. ADVANTAGES THAT ARE OBTAINED THROUGH THIS PROCEDURE IN RELATION TO THE PREVIOUS STATE OF THE TECHNIQUE: A) PROCESSES PERFORMED IN QUICK, SMOOTH AND SIMPLE CONDITIONS OBTAINING HIGH QUALITY PRODUCTS. B) THE LAST STEP IS PERFORMED IN THE SOLID PHASE, AVOIDING TRACES OF SYMMETRIC DIHYDROPYRIDINE. C) OBTAINING DIHYDROPIRIDINE WITHOUT SOLVENT, MINIMUM PRODUCTION OF CONTAMINANT EFFLUENTS. D) USE OF BASIC CATALYSTS OR RECYCLABLE ACIDS. E) LOW COST IN THE PROCESSES, MINIMIZATION OF REAGENTS AND WASTE. F) LOW ENVIRONMENTAL IMPACT.

ES9201892A 1992-09-22 1992-09-22 PROCEDURE FOR OBTAINING 2,6-DIMETIL-4- (3-NITROFENIL) -1,4-DIHIDROPIRIDIN-3,5-DICARBOXILATO DE 3-ETIL-5-METHYL. Expired - Fee Related ES2055654B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES9201892A ES2055654B1 (en) 1992-09-22 1992-09-22 PROCEDURE FOR OBTAINING 2,6-DIMETIL-4- (3-NITROFENIL) -1,4-DIHIDROPIRIDIN-3,5-DICARBOXILATO DE 3-ETIL-5-METHYL.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES9201892A ES2055654B1 (en) 1992-09-22 1992-09-22 PROCEDURE FOR OBTAINING 2,6-DIMETIL-4- (3-NITROFENIL) -1,4-DIHIDROPIRIDIN-3,5-DICARBOXILATO DE 3-ETIL-5-METHYL.

Publications (2)

Publication Number Publication Date
ES2055654A1 ES2055654A1 (en) 1994-08-16
ES2055654B1 true ES2055654B1 (en) 1995-03-01

Family

ID=8278207

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9201892A Expired - Fee Related ES2055654B1 (en) 1992-09-22 1992-09-22 PROCEDURE FOR OBTAINING 2,6-DIMETIL-4- (3-NITROFENIL) -1,4-DIHIDROPIRIDIN-3,5-DICARBOXILATO DE 3-ETIL-5-METHYL.

Country Status (1)

Country Link
ES (1) ES2055654B1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4780538A (en) * 1986-02-12 1988-10-25 Merck & Co., Inc. Process for 1,4-dihydropyridine compounds using a titanamine catalyst
IT1230752B (en) * 1989-02-17 1991-10-29 Boehringer Biochemia Srl PROCESS FOR THE PREPARATION OF 1,4 POLY-SUBSTITUTED DIHYDROPYRIDINS IN AN ANTIOMERICALLY PURE FORM.

Also Published As

Publication number Publication date
ES2055654A1 (en) 1994-08-16

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Legal Events

Date Code Title Description
PC2A Transfer granted

Owner name: BYK LEO LABORATORIO FARMACEUTICO, S.L.

FD1A Patent lapsed

Effective date: 20060923