Resumes
Resumes
Ratna Shekhar Phones & Addresses
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1401 W Deerpath, Lake Forest, IL 60045
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441 Bair Rd, Berwyn, PA 19312 (610) 889-7571
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61 Ridgedale Ave, Madison, NJ 07940 (973) 360-9397
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171 Main St, Madison, NJ 07940
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Newark, DE
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Morris Plains, NJ
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Malvern, PA
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Downingtown, PA
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Chester, PA
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441 Bair Rd, Berwyn, PA 19312
Education
Degree:
Associate degree or higher
Publications
Us Patents
Air Oxidation Of An Aromatic Aldehyde To An Aromatic Acid
View pageUS Patent:
6740776, May 25, 2004
Filed:
Jul 15, 2002
Appl. No.:
10/196600
Inventors:
Ratna Shekhar - Madison NJ
Michael John Girgis - Montville NJ
Michael John Girgis - Montville NJ
Assignee:
Novartis AG - Basel
International Classification:
C07C 5123
US Classification:
562418, 562421
Abstract:
A low temperature process for preparing an aromatic acid having formula (I), said process comprising reacting an aromatic aldehyde having formula (II) with a gas having an oxygen content of 1 to 100 weight percent, based on the total weight of the gas, at a temperature of about 20Â C. to less than 100Â C. in the presence of a supported Group VIII metal catalyst, and a solvent having a flash point greater than 95Â C. and/or a melting point less than 55Â C. , provided that the flash point of the solvent is greater than the reaction temperature, wherein R and R are independently selected from the group consisting of hydrogen and a C -C linear, branched or cyclic alkyl group. The process of the invention yields an aromatic acid in excellent yield, and (i) does not involve the use of deleterious oxidizing agents; (ii) is essentially free of by-products; and (iii) is accomplished at a temperature of less than 100Â C.
Process For Producing Amino Acid Amides
View pageUS Patent:
62713949, Aug 7, 2001
Filed:
Nov 2, 2000
Appl. No.:
9/704500
Inventors:
Ratna Shekhar - Madison NJ
Michael John Girgis - Montville NJ
Michael John Girgis - Montville NJ
Assignee:
Novartis AG - Basel
International Classification:
C07D20700
US Classification:
548537
Abstract:
Disclosed are methods for the synthesis of amino acid amides which comprise providing a fixed bed of a cation exchange resin, admixing a primary alcohol and an amino acid in a reaction vessel in fluid communication with the fixed bed to form a first mixture, contacting the fixed bed of cation exchange resin with the first mixture for a period of time, thereby causing amino acid ester intermediate to be formed on the cation exchange resin, adding liquid ammonia to the reaction vessel, and contacting the fixed bed of cation exchange resin with ammonia, the fixed bed having previously been contacted with the first mixture.