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You can use Global Patent Index (GPI) to carry out detailed searches in the EPO's worldwide bibliographic (DOCDB), legal event (INPADOC) and full-text data sets, and download or visualise the search results for statistical analysis.

Current content: 157 337 350 patent documents

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219 431 new documents added

1 247 852 documents amended

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EP 2004644 A1 20081224 - PROCESS FOR THE PREPARATION OF TADALAFIL

Title (en)

PROCESS FOR THE PREPARATION OF TADALAFIL

Title (de)

VERFAHREN ZUR HERSTELLUNG VON TADALAFIL

Title (fr)

PROCEDE DE PREPARATION DE TADALAFIL

Publication

EP 2004644 A1 20081224 (EN)

Application

EP 07734067 A 20070323

Priority

IB 2007000737 W 20070323
IN 438MU2006 A 20060324
IN 1135MU2006 A 20060717
IN 1918MU2006 A 20061120
US 87264806 P 20061204

Abstract (en)

[origin: WO2007110734A1] The present invention provides novel intermediates of tadalafil and processes for their preparation. The present invention also provides for the preparation of tadalafil or a pharmaceutically acceptable salt or solvate thereof using the intermediates.

IPC 8 full level

C07D 471/04 (2006.01); C07D 471/14 (2006.01)

CPC (source: EP)

C07D 471/04 (2013.01); C07D 471/14 (2013.01)

Citation (search report)

See references of WO 2007110734A1

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2007110734 A1 20071004; EP 2004644 A1 20081224

DOCDB simple family (application)

IB 2007000737 W 20070323; EP 07734067 A 20070323