EP 0000092 A1 19781220 - Method of preparing ascorbic acid and intermediates specially adapted for use therein.
Title (en)
Method of preparing ascorbic acid and intermediates specially adapted for use therein.
Title (de)
Verfahren zur Herstellung von Ascorbinsäure und speziell für dieses Verfahren geeignete Zwischenprodukte.
Title (fr)
Procédé de préparation de l'acide ascorbique et intermédiaires spécialement adaptés à la mise en oeuvre de ce procédé.
Publication
Application
Priority
US 80302077 A 19770603
Abstract (en)
The invention relates to a process for preparing ascorbic acid in which (a) gulono-, galactono-, idono- or talono-1,4-lactone is reacted with at least one hydroxyl-protecting reagent so as to protected the free hydroxyl groups in the 5-, 6- and either the 2- or 3- positions, or, reacting gulono- or idono-1,4-lactone with at least one hydroxyl-protecting reagent so as to protect the free hydroxyl groups in the 3-, 5- and optionally the 6- positions (b) oxidizing the free hydroxyl group at the 2- or 3- position to oxidize it to an oxo group and (c) hydrolyzing the compound formed in (b) to ascorbic acid. Certain novel intermediates useful in the above process are also covered.
IPC 1-7
IPC 8 full level
C07D 307/33 (2006.01); C07D 307/62 (2006.01); C07D 407/04 (2006.01); C07D 493/04 (2006.01); C07F 7/18 (2006.01); C07H 7/027 (2006.01)
CPC (source: EP US)
C07D 307/33 (2013.01 - EP US); C07D 307/62 (2013.01 - EP US); C07D 407/04 (2013.01 - EP US); C07D 493/04 (2013.01 - EP US); C07F 7/1804 (2013.01 - EP US); C07H 7/027 (2013.01 - EP US); Y02P 20/55 (2015.11 - EP US)
Citation (search report)
- CHEMICAL ABSTRACTS, 82 (1975), 73330k & Agrio. Biol. Chem. 1974, 38, (11) 2189-90.
- CHEMICAL ABSTRACTS 70 (1969) 4455v. & Chem. Pharm Bull. (Tokyo), 1968, 16 (7), 1294-9
Designated contracting state (EPC)
BE DE FR GB LU NL
DOCDB simple family (publication)
US 4111958 A 19780905; DE 2860636 D1 19810806; DK 248178 A 19781204; EP 0000092 A1 19781220; EP 0000092 B1 19810429; IE 47102 B1 19831228; IE 781103 L 19781203; IT 1098308 B 19850907; IT 7824178 A0 19780602; JP S543058 A 19790111; JP S55149286 A 19801120; JP S5719117 B2 19820420; JP S5845432 B2 19831008
DOCDB simple family (application)
US 80302077 A 19770603; DE 2860636 T 19780602; DK 248178 A 19780602; EP 78300014 A 19780602; IE 110378 A 19780601; IT 2417878 A 19780602; JP 5934380 A 19800502; JP 6659378 A 19780602