ECSP993154A - PROCEDURE FOR THE PREPARATION OF PIRAZOLO (4,3, d) -PIRIMIDIN -7-ONAS AND ITS INTERMEDIATES - Google Patents

PROCEDURE FOR THE PREPARATION OF PIRAZOLO (4,3, d) -PIRIMIDIN -7-ONAS AND ITS INTERMEDIATES

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Publication number
ECSP993154A
ECSP993154A ECSP993154A ECSP993154A EC SP993154 A ECSP993154 A EC SP993154A EC SP993154 A ECSP993154 A EC SP993154A EC SP993154 A ECSP993154 A EC SP993154A
Authority
EC
Ecuador
Prior art keywords
preparation
pirazolo
pirimidin
onas
intermediates
Prior art date
Application number
Other languages
Spanish (es)
Inventor
Peter James Dunn
Philip Charles Levett
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42044142&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ECSP993154(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed filed Critical
Priority to ECSP993154 priority Critical patent/ECSP993154A/en
Publication of ECSP993154A publication Critical patent/ECSP993154A/en

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Abstract

Se proporciona un procedimiento para la preparación de un compuesto de fórmulas (IA) (sildenafil/Viagratm) y (IB) (gráfico), que comprende hacer reaccionar un compuesto de fórmula (IIA) y (IIB), respectivamente, en presencia de OR, siendo R, en el caso de la fórmación del compuesto (IA), CH2CH3 y, siendo R, en el caso de la formación del compuesto (IB), CH2CH2CH3, y siendo X un grupo saliente (gráfico).A process is provided for the preparation of a compound of formulas (IA) (sildenafil / Viagratm) and (IB) (graph), which comprises reacting a compound of formula (IIA) and (IIB), respectively, in the presence of OR , where R, in the case of the formation of compound (IA), CH2CH3 and, where R, in the case of the formation of compound (IB), CH2CH2CH3, and where X is a leaving group (graph).

ECSP993154 1999-09-27 1999-09-27 PROCEDURE FOR THE PREPARATION OF PIRAZOLO (4,3, d) -PIRIMIDIN -7-ONAS AND ITS INTERMEDIATES ECSP993154A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ECSP993154 ECSP993154A (en) 1999-09-27 1999-09-27 PROCEDURE FOR THE PREPARATION OF PIRAZOLO (4,3, d) -PIRIMIDIN -7-ONAS AND ITS INTERMEDIATES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ECSP993154 ECSP993154A (en) 1999-09-27 1999-09-27 PROCEDURE FOR THE PREPARATION OF PIRAZOLO (4,3, d) -PIRIMIDIN -7-ONAS AND ITS INTERMEDIATES

Publications (1)

Publication Number Publication Date
ECSP993154A true ECSP993154A (en) 1999-10-29

Family

ID=42044142

Family Applications (1)

Application Number Title Priority Date Filing Date
ECSP993154 ECSP993154A (en) 1999-09-27 1999-09-27 PROCEDURE FOR THE PREPARATION OF PIRAZOLO (4,3, d) -PIRIMIDIN -7-ONAS AND ITS INTERMEDIATES

Country Status (1)

Country Link
EC (1) ECSP993154A (en)

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