L- -2,3-Dihydroxybutanedioic acid

CN (17/ ,21a)-17,21-dihydroxy-4-propylajmalanium salt with [R-(R, / )l-2,3-dihydroxybutanedioic acid... 

L-(+)-2,3-Dihydroxybutanedioic acid (2R,3R)-2,3-dihydroxy-butane-l,4-dioic acid 2,3-dibydroxysuccinic acid E334 d-tartaric acid L-(+)-tartaric acid. 

Synonyms Butanedioic acid, 2,3-dihydroxy- 2,3-Dihydrosuccinic acid Dihydroxybutanedioic acid 2,3-Dihydroxybutanedioic acid L-2,3-Dihydroxybutanedioic acid... 

Tartaric acid [526-83-0] (2,3-dihydroxybutanedioic acid, 2,3-dihydroxysuccinic acid), C H O, is a dihydroxy dicarboxyhc acid with two chiral centers. It exists as the dextro- and levorotatory acid the meso form (which is inactive owing to internal compensation), and the racemic mixture (which is commonly known as racemic acid). The commercial product in the United States is the natural, dextrorotatory form, (R-R, R )-tartaric acid (L(+)-tartaric acid) [87-69-4]. This enantiomer occurs in grapes as its acid potassium salt (cream of tartar). In the fermentation of wine (qv), this salt forms deposits in the vats free crystallized tartaric acid was first obtained from such fermentation residues by Scheele in 1769. 

Calcium Tartrate, 2,3.Dihydroxybutanedioic acid calcium salt. C4H4Ca06 mol wt 188.15. C 25.53%, H 2.147c, Ca 21.30%, O 51.02%. CaC4H404. A byproduct of the wine industry. Prepn from wine dregs Dabul, U.S. pat. 3,114,770 (1963 to Orandi Massera). See also the processes mentioned under L-tartaric acid. 

AntiweinsSure Butanedioic acid, 2,3-dihydroxy-, (2R,3S)-rel- (R, S )-2,3-Dihydroxybutanedioic acid L-( )-Dihydroxysuccinic acid EINECS 205-696-1 internally compensated tartaric acid meso-Tartaric acid unresolvable tartaric acid. Prepared by raoemization of L-tartaric acid. Crystals mp = 140° 1,66 soluble in H2O (125... 

The monoaminomonophosphonic acids, either in the free state or, very often, as their diethyl esters, have been resolved by the usual techniques of repeated crystallization of appropriate salts those of L-(+)-tartaric acid (2,3-dihydroxybutanedioic acid) or its mono-or di-benzoyl derivativesor of D-(-)-mandelic acid, have been widely employed the use of di-O-benzoylated L-tartaric anhydride, which is based on the separation of diastereoisomeric amides (111), has also been employed to a limited extent. In selected cases, such as the monoaminomonophosphonocarboxylic acids or A -acylated (aminoalkyl)phosphonic acids, resolution following salt formation with organic bases has also been carried out ephedrine, quinine and both enantiomers of l-phenylethylamine have all been used. In many cases, only one enantiomer of the (aminoalkyl)phosphonic acid (or diester) has been isolated in optically pure form. Sometimes, the acidity of the substrate, and hence choice of base for resolution, can be modified by using a mono- (as opposed to di-) ester or (or even in addition to) protection of the amino group as, for example, the phthalimido, benzyloxycarbonyl (cbz) or r r -butyloxycarbonyl (boc) derivative. Resolved di- and mono-esters can be hydrolysed to the free acids under acidic conditions, and A -protection can also be removed through the customary procedures. 

Tartaric acid serves as the stereochemical connection between the carbohydrates and glyceraldehyde, and is a chiral butanediol that exists in three forms. L-( + )-Tartaric acid, (27, 3/ )-2,3-dihydroxybutanedioic acid 1 (R=H), is referred to as the natural form, and it is widely distributed in nature and classified as a fruit acid. D-( —)-(2 S, 35)-2,3-dihydroxy-butanedioic acid 2 (R=H) is often called unnatural , although it does occur in nature as well. It has the same absolute configuration as D-glyceraldehyde. A third form, called meso-tartaric acid, possess an internal plane of symmetry and is thus inherently racemic and unresolvable. The name tartaric acid is derived from Tartarus, and is probably of medieval and alchemical origin. 

Synonyms Diethyl 2,3-dihydroxybutanedioate Diethyl 2,3-dihydroxysuccinate (+)-Diethyl L-tartrate (R)-2,3-Dihydroxybutanedioic acid diethyl ester Ethyl tartrate... 

Dihydroxybutanedioic acid. See L-Tartaric acid DL-Tartaric acid... 

Synonyms 2,3-Dihydroxybutanedioic acid, monopotassium monosodium salt Monopotassium monosodium tartrate Potassium sodium L-(+)-tartrate Potassium sodium tartrate anhydrous Rochelle salt Seignette salt Sodium potassium tartrate Classification Organic salt Definition Sodium potassium salt of L-tartaric acid avail, as the tetrahydrate Empirical C4H4KNaOe Formula KNaC4H40e... 

Metal meso-2, 3-Dihydroxybutanedioic acid (meso-tartaric acid) H.L... 

SYNS (S)-3-(l-METHYL-2-P RROLIDINYL-PYRIDINE (R)-(R,R))-2,3-DIHYDROXYBUTANEDIOATE (1 2) NICOTINE ACID TARTRATE NICOTINE BITARTRATE NICOTINE HYDROGEN TARTRATE (-)-NICOTINE HYDROGEN TARTRATE NICOTINE... 

Fehling s solution A solution used to test for the aldehyde group (-CHO). It is a freshly made mixture of copper(ll) sulfate solution with alkaline potassium sodium 2,3-dihydroxybutanedioate (tartrate). The aldehyde, when heated with the mixture, is oxidized to a carboxylic acid, and a red precipitate of copper(l) oxide and copper metal is produced. The tartrate is present to complex with the original copper(II) ions to prevent precipitation of copper(II)... 

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