MX9705481A - Farmacos. - Google Patents
Farmacos.Info
- Publication number
- MX9705481A MX9705481A MX9705481A MX9705481A MX9705481A MX 9705481 A MX9705481 A MX 9705481A MX 9705481 A MX9705481 A MX 9705481A MX 9705481 A MX9705481 A MX 9705481A MX 9705481 A MX9705481 A MX 9705481A
- Authority
- MX
- Mexico
- Prior art keywords
- carboxy
- hydrogen
- purine
- cyano
- hydroxy
- Prior art date
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- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Abstract
Un proceso para la preparacion de: i) penciclovir o ii) famciclovir dicho proceso comprende una o más de las siguientes etapas: a) formar una purina por cierre del anillo de imidazol o pirimidina: b) reaccionar una purina con un intermediario precursor de cadena lateral en la posicion 9 apropiado; c) conversion de una cadena lateral en la posicion 9 a: i) 4-hidroxi-3-hidroximetilbut-1-ilo o ii) 4-acetoxi-3-acetoximetilbut-1-ilo d) conversion de una purina a: i) guanina o ii) 2-aminopurina: caracterizado en que: la purina es de la formula (I): en donde una de entre X1 y X2 es ciano o carboxi, o un derivado de carboxi; y la otra se selecciona de: X1 es ciano o carboxi, o un derivado de carboxi, o hidrogeno, o hidroxi o un agrupamiento convertible a hidrogeno o hidroxi; X2 es ciano o carboxi, o un derivado de carboxi, o hidrogeno o un agrupamiento convertible a hidrogeno; R1 es amino o un grupo convertible al mismo; y R2 es hidrogeno o una cadena lateral en la posicion 9: la cual se convierte a famciclovir o penciclovir por: X1 y/o X2 es ciano o un derivado de carboxi que se convierte a carboxi; y X1 y/o X2 es carboxi que se convierte a X1 y/o X2 hidrogeno por descarboxilacion; y/o X1 es carboxi, que se convierte a X1 siendo hidroxi, por hidrolisis.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9615276.4A GB9615276D0 (en) | 1996-07-20 | 1996-07-20 | Pharmaceuticals |
GB9615276.4 | 1996-07-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
MX9705481A true MX9705481A (es) | 1998-08-30 |
MXPA97005481A MXPA97005481A (es) | 1998-11-12 |
Family
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Also Published As
Publication number | Publication date |
---|---|
AT412872B (de) | 2005-08-25 |
PT102027A (pt) | 1998-01-30 |
ES2138537A1 (es) | 2000-01-01 |
ATA122697A (de) | 2005-01-15 |
GR1002942B (el) | 1998-07-21 |
GB9615276D0 (en) | 1996-09-04 |
ES2138537B1 (es) | 2000-11-16 |
PT102027B (pt) | 1999-04-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
GB | Transfer or assignment |
Owner name: NOVARTIS INTERNATIONAL PHARMACEUTICAL LTD. |
|
FG | Grant or registration | ||
MM | Annulment or lapse due to non-payment of fees |