| (19) |
 |
|
(11) |
EP 2 270 009 A8 |
| (12) |
CORRECTED EUROPEAN PATENT APPLICATION |
|
Note: Bibliography reflects the latest situation |
| (15) |
Correction information: |
|
Corrected version no 1 (W1 A1) |
| (48) |
Corrigendum issued on: |
|
08.06.2011 Bulletin 2011/23 |
| (43) |
Date of publication: |
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05.01.2011 Bulletin 2011/01 |
| (22) |
Date of filing: 22.03.2010 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO
PL PT RO SE SI SK SM TR |
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Designated Extension States: |
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AL BA ME RS |
| (30) |
Priority: |
30.06.2009 IT MI20091149
|
| (71) |
Applicant: Dipharma Francis S.r.l. |
|
20021 Baranzate (MI) (IT) |
|
| (72) |
Inventors: |
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- Allegrini, Pietro
20097, S. DONATO MILANESE (MI) (IT)
- Attolino, Emanuele
74019, PALAGIANO (TA) (IT)
- Dell'Anna, Gianmaria
20154, Milano (IT)
- Michieletti, Mario
28100, Novara (IT)
|
| (74) |
Representative: Minoja, Fabrizio |
|
Bianchetti Bracco Minoja S.r.l.
Via Plinio, 63
20129 Milano
20129 Milano (IT) |
|
| |
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| (54) |
Process for the preparation of sitagliptin |
(57) A process for the preparation of 2(R)-4-oxo-4-[3-(trifluoromethyl)-5,6-dihydro[1,2,4]triazolo[4,3-
a]-7(8H)-pyrazinyl]-1-(2,4,5-trifluorophenyl)-2-butanamine and intermediates useful
for the synthesis thereof.