ES8106502A1 - Procedimiento para la preparacion de 3(6 5)-formilpira- zol-4-carboxilatos de alquilo - Google Patents

Procedimiento para la preparacion de 3(6 5)-formilpira- zol-4-carboxilatos de alquilo

Info

Publication number
ES8106502A1
ES8106502A1 ES493459A ES493459A ES8106502A1 ES 8106502 A1 ES8106502 A1 ES 8106502A1 ES 493459 A ES493459 A ES 493459A ES 493459 A ES493459 A ES 493459A ES 8106502 A1 ES8106502 A1 ES 8106502A1
Authority
ES
Spain
Prior art keywords
alkyl
translation
procedure
preparation
machine
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
Application number
ES493459A
Other languages
English (en)
Other versions
ES493459A0 (es
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.)
Consejo Superior de Investigaciones Cientificas CSIC
Original Assignee
Consejo Superior de Investigaciones Cientificas CSIC
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 Consejo Superior de Investigaciones Cientificas CSIC filed Critical Consejo Superior de Investigaciones Cientificas CSIC
Priority to ES493459A priority Critical patent/ES8106502A1/es
Publication of ES493459A0 publication Critical patent/ES493459A0/es
Publication of ES8106502A1 publication Critical patent/ES8106502A1/es
Expired legal-status Critical Current

Links

Landscapes

  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Abstract

PROCEDIMIENTO PARA LA PREPARACION DE 3(O 5)-FORMULPIRAZOL-4-CARBOXILATOS DE ALQUILO. CONSTA DE LAS SIGUIENTES ETAPAS: 1. REDUCCION SELECTIVA EN EL PIRAZOLDICARBOXILATO DE ALQUILO DEL GRUPO ALCOXICARBONILO EN POSICION 3(O 5), EN CONDICIONES QUE NO ALTERE EL GRUPO ESTER EN POSICION 4, LO CUAL SE EFECTUA POR TRATAMIENTO CON HIDRURO DE LITIO U ALUMINIO EN UN DISOLVENTE TAL COMO ETER ETILICO, TETRAHIDROFURANO O ETER DIMETILICO DEL DIETILENGLICOL, A TEMPERATURAS ENTRE 20 Y 80 GC DURANTE PERIODOS DE TIEMPO QUE OSCILAN ENTRE NOVENTA MINUTOS Y CINCO HORAS, CON LO QUE SE OBTIENE UN 3(O 5)-HIDROXIMETILPIRAZOL-4-CARBOXILATO DE ALQUILO. 2. OXIDACION DEL PRODUCTO OBTENIDO EN LA ETAPA ANTERIOR, CON REACTIVOS TALES COMO TRIOXIDO DE BROMO/PIRIDINA, BIOXIDO DE MANGANESO ACTIVO, NITRATO, NITRATO CERICO AMONICO Y OTROS SIMILARES. T
ES493459A 1980-07-17 1980-07-17 Procedimiento para la preparacion de 3(6 5)-formilpira- zol-4-carboxilatos de alquilo Expired ES8106502A1 (es)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES493459A ES8106502A1 (es) 1980-07-17 1980-07-17 Procedimiento para la preparacion de 3(6 5)-formilpira- zol-4-carboxilatos de alquilo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES493459A ES8106502A1 (es) 1980-07-17 1980-07-17 Procedimiento para la preparacion de 3(6 5)-formilpira- zol-4-carboxilatos de alquilo

Publications (2)

Publication Number Publication Date
ES493459A0 ES493459A0 (es) 1981-07-01
ES8106502A1 true ES8106502A1 (es) 1981-07-01

Family

ID=8480810

Family Applications (1)

Application Number Title Priority Date Filing Date
ES493459A Expired ES8106502A1 (es) 1980-07-17 1980-07-17 Procedimiento para la preparacion de 3(6 5)-formilpira- zol-4-carboxilatos de alquilo

Country Status (1)

Country Link
ES (1) ES8106502A1 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8410117B2 (en) 2010-03-26 2013-04-02 Hoffmann-La Roche Inc. Imidazopyrimidine derivatives

Also Published As

Publication number Publication date
ES493459A0 (es) 1981-07-01

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970612