Process for the synthesis of 2,5-dihydroxyterephthalic acid

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C562S400000

Reexamination Certificate

active

07339076

ABSTRACT:
2,5-dihydroxyterephthalic acid is produced in high yields and high purity from 2,5-dihaloterephthalic acid by contact with a copper source and a ligand that coordinates to copper under basic conditions.

REFERENCES:
patent: 3047536 (1962-07-01), Gordon
patent: 3227680 (1966-01-01), Tamblyn et al.
patent: 3894079 (1975-07-01), Knobloch
patent: 5674969 (1997-10-01), Sikkema et al.
patent: 265 244 (1964-10-01), None
patent: 1812703 (1969-08-01), None
patent: 1238224 (1971-07-01), None
patent: 112706 (1998-04-01), None
patent: WO 2006/104974 (2006-10-01), None
U.S. Appl. No. 60/665,737, filed Mar. 28, 2005, Steven R. Allen et al.
Adolf Marzin, 2,5-Dibromotoluic Acid, Journal Fuer Praktische Chemie, 1933, pp. 103-106.
Tara Singh et. al., Di-Xanthones. Part I. Chromono-2′:3′-2:3-Xanthone. Jour. Indian Chem. Soc., 1957, vol. 34:321-323.
Irena Rusonik et. al., CU(I)(2,5,8,11-Tetramethyl-2,5,8,11-Tetraazadodecane)+ as a Catalyst for Ullmann's Reaction, Dalton Transactions, pp. 2024-2028, 2003.
Rolando F. Pellon Comdom et. al., Synthesis of Salicyclic Acid Derivatives From the Corresponding 2-Chlorobenzoic Acid Using Water as Solvent, Synthetic Communications, 2002, vol. 32:2055-2059.
J. E. McIntyre et al., The Oxidation of Alkylaromatic Compounds in Aqueous Hydrogen Bromide., Journal of the Chemical Society, Abstracts, 1961, pp. 4082-4085.
F. F. Shcherbina et. al., Liquid-Phase Oxidation of 2,5-Dichloro-P-Xylene, Zhurnal Prikladnoi Khimii, Sankt-Peterburg, Russian Federation, 1990. vol. 63:467-470.
Robert J. Perry et. al., Synthesis of Polyimides via the Palladium-Catalyzed Carbonylation of BIS(O-Iodo Esters) and Diamines, Macromolecules, 1995, vol. 28:3509-3515.
Magal Saphier et al., Copper(I) as a Homogeneous Catalyst for the Ullmann Reaction in Aqueous Solutions—The Transformation of 2-Bromobenzoate into Salicylate.
U.S. Appl. No. 11/604,942, Ritter.
Ruggli and Brandt, A New Linear Benzodipicoline, 2,6-Dimethyl-1,5-anthrazoline, 51stCommunication Concerning Nitrogen Heterocycles, Basel University Institute for Organic Chemistry, Basel, Switzerland, Jan. 6, 1944.
Kevin W. Anderson et al, The Selective Reaction of Aryl Halides with KOH: Synthesis of Phenols, Aromatic Ethers, and Benzofurans: J. Am. Chem. Soc. 2006, 128, 10694-10695, American Chemical Society, New York NY.
Doetze J. Sikkema, Manmade Fibers One Hundred Years: Polymers and Polymer Design, Journal of Applied Polymer Science, vol. 83, 484-488, 2002, John Wiley & Sons, Inc., New York NY.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Process for the synthesis of 2,5-dihydroxyterephthalic acid does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the synthesis of 2,5-dihydroxyterephthalic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the synthesis of 2,5-dihydroxyterephthalic acid will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2813750

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.