official journal of the patent office - Controller General of Patents ...

(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) Application No.: 1252/MUM/2004 A
(22) Date of filing of Application: 22/11/2004 (43) Publication Date: 09/06/2006
(54) Title of the invention: A PROCESS FOR THE PREPARATION OF ZALEPLON
(51) International classification : A61K 9/00
(31) Priority Document No : NIL
(32) Priority Date : NIL
(33) Name of priority country : NIL
(86) International Application No : NIL
and Filing Date : NIL
(87) International Publication No : NIL
(61) Patent of addition to :
Application No
NIL
(62)
Filed on : N.A.
Divisional to Application No : NIL
Filed on : N.A.
(71) Name of Applicant:
CADILA PHARMACEUTICALS LTD.
Address of the Applicant:
CADILA CORPORATE CAMPUS,
SARKHEJ-DHOLKA ROAD, BHAT,
AHMEDABAD-382210, GUJARAT,
INDIA.
(72) Name of the Inventor:
1. MR.INDRAVADAN AMBALAL
MODI
2. DR.MANISH CHANDRAKANT
SHUKLA
3. MR.VALA VALA SRINIVAS
4. DR.NIRAV KESHAVLAL
KAGATHARA
5. MR.NILESH MANJIBHAI
JAMARIA
6. MR.SURYABHAN PRABHAKAR
DANGE
7. DR.J.VENKAT RAMAN
8. DR.BAKULESH MAFATLAL
KHAMAR
Filed U/S 5(2) before The Patents
(Amendment) Act, 2005: NO
(57) Abstract: The present invention relates to a novel and commercially feasible process for the preparation of
pyrazolo [1.5-��� ����������� ��������� ���������� �������� �� ������ ������������� �-(3-bromophenyl)-3,7—
dihydropyrazolo[1.5-�������������-3-carbonitrile is coupled with acetamide to yield a N-[3-(3-cyanopyrazolo
[1.5-�����������-7-yl)phenyl] acetamide which on ethylation gives zaleplon.
Drawing Sheets: NIL
Total Pages: 24.
Fig. Nil
The Patent Office Journal 09/06/2006 10918