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Abstract: A process for the preparation of 2-Hydroxy benzonitriles, which comprises the following steps (i) Protecting the hydroxyl group of salicylamide by forming the acetyl / benzyl derivative (ii) Dehydrating the resultant hydroxyl protected compound by dehydrating agents like thionyl chloride or phosphorous oxy chloride (iii) Cleaving the protected group by hydrolysis using mineral acids like hydrochloric acid, sulphuric acid or catalytically using palladium on Carbon catalyst or platinum on carbon catalyst, and the product is isolated by filtering of the catalyst and distilling the solvent.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
03 December 2002
Publication Number
Publication Type
INA
Invention Field
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2006-02-06
Renewal Date
Applicants
RALLIS INDIA LIMITED
RALLI HOUSE,
21, D.S MARG,
FORT, MUMBAI-
Inventors
1. MOODALMAKKI SATHYANARAYANA MITHYANTHA
RALLIS RESEARCH CENTER
# 21 & 22, P
EENYA INDUSTRIAL AREA,
PHASE-II,
BANGALORE-560 058.
2. KOTHAPALLI SUNDARARAJA RAO
RALLIS RESEARCH CENTER
# 21 & 22, P
EENYA INDUSTRIAL AREA,
PHASE-II,
BANGALORE-560 058.
3. SRINIVASAN SRIKANTH
RALLIS RESEARCH CENTER
# 21 & 22, P
EENYA INDUSTRIAL AREA,
PHASE-II,
BANGALORE-560 058.
4. KOTIKANYADANAM NARASIMHA THATHACHAR RAVIKUMAR
RALLIS RESEARCH CENTER
# 21 & 22, P
EENYA INDUSTRIAL AREA,
PHASE-II,
BANGALORE-560 058.
5. SHASHIPRABHA
RALLIS RESEARCH CENTER
# 21 & 22, P
EENYA INDUSTRIAL AREA,
PHASE-II,
BANGALORE-560 058.
6. NADOLI BHAVAA
RALLIS RESEARCH CENTER
# 21 & 22, P
EENYA INDUSTRIAL AREA,
PHASE-II,
BANGALORE-560 058.
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 1083-mum-2002-form 1(03-12-2002).pdf | 2002-12-03 |
| 2 | 1083-mum-2002-form 3(27-12-2002).pdf | 2002-12-27 |
| 3 | 1083-mum-2002-form 19(21-11-2003).pdf | 2003-11-21 |
| 4 | 1083-mum-2002-correspondence(ipo)-(04-01-2005).pdf | 2005-01-04 |
| 5 | 1083-mum-2002-form 13(06-01-2005).pdf | 2005-01-06 |
| 6 | 1083-mum-2002-form 2(granted)-(07-01-2005).pdf | 2005-01-07 |
| 8 | 1083-mum-2002-correspondence 1(07-01-2005).pdf | 2005-01-07 |
| 9 | 1083-mum-2002-claims(granted)-(07-01-2005).pdf | 2005-01-07 |
| 11 | 1083-mum-2002-cancelled pages(07-01-2005).pdf | 2005-01-07 |
| 12 | 1083-mum-2002-correspondence 2(14-02-2008).pdf | 2008-02-14 |