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D- -Fructopyranose

P-D-fructofuranose a-D-glucopyranose 1,2 2,1 -dianhydride a-D-fructofuranose a-D-glucopyranose 1,1 2,2 -dianhydride P-D-fructofuranose a-D-glucopyranose 1,1 2,2 -dianhydride P-D-fructopyranose a-D-glucopyranose 1,1 2.2 -dianhydride P-D-fructofuranose a-D-glucopyranose 2,1 3,2 -dianhydride P-D-fructopyranose a-D-sorbopyranose 1,2 2,1 -dianhydride P-D-fructopyranose a-L-sorbopyranose 1,2 2,1 -dianhydride di-a-L-sorbofuranose 1,2 2,3 -dianhydride a-l-sorbofuranose a-L-sorbopyranose 2,1 3,2 -dianhydride di-a-L-sorbopyranose 1,2 2,1 -dianhydride a-D-sorbopyranose a-L-sorbopyranose 1,2 2,1 -dianhydride di p-L-sorbopyranose 1,2 2,1 -dianhydride a-L-sorbopyranose p-L-sorbopyranose 1,2 2,1 -dianhydride a-L-sorbofuranose a-L-sorbopyranose l,2 2,l -dianhydride P-L-sorbofuranose a-L-sorbopyranose 1,2 2,1 -dianhydride a-L-sorbofuranose P-L-sorbofuranose l,2 2,l -dianhydride... [Pg.241]

O-a-D-Glucopyranosyl-a-D-fructopyranose 4-O-a-D-glucopyranosyl-P-D-fructopyranose 1,2 2,1 -dianhydride (23) 4-O-a-D-Galactopyranosyl-a-D-fructopyranose 4-O-a-D-galactopyranosyl-p-D-fructopyranose 1,2 2,1 -dianhydride (24)... [Pg.254]

Deoxy-6-iodo-a-D-fructofuranose p-D-fructopyranose 1,2 2,1 -dianhydride (49) 6-Chloro-6-deoxy-a-D-fructofuranose p-D-fructopyranose 1,2 2,1 -dianhydride (50) 6-5-Heptyl-6-thio-tt-D-fructofuranose p-D-fructopyranose 1,2 2,l -dianhydride (51) 6-Azido-6-deoxy-a-D-ffuctofuranose P-D-fructopyranose 1,2 2,l -dianhydride (52) 6-Anuno-6-deoxy-a-D-fructofuranose p-D-fructopyranose 1,2 2,l -dianhydride (53) 6-Acetamido-6-deoxy-a-D-fructofuranose p-D-fructopyranose 1,2 2,l -dianhydride (54)... [Pg.260]

D-Fructose is the sweetest sugar known in naturally occurring carbohydrates, and its intense sweetness is produced only by ) -D-fructopyranose. "... [Pg.49]

The 6a-carba-y -D-fructopyranose molecule may have this tripartite arrangement (AH, B, and X) in almost the same emplacement as has the y -D-fructopyranose molecule. [Pg.49]

As it has been revealed that replacement of the ring-oxygen atom in a pyranoid sugar by a CH2 group is not detrimental to its sweetness, 6a-carba- -D-fructopyranose may have the same intense sweetness as D-fruc-tose. To substantiate this prediction, the following two reaction routes have been successfully developed for 6a-carba-y -DL-fructopyranose, as well as for the enantiomers. [Pg.50]

Treatment of inulin or D-fructose with liquid HF (neat or diluted with liquid SOj) gave a mixture of six di-D-fructose dianhydrides, including 23, 25, 27, and )3-D-fructofuranosyl ) -D-fructopyranose 2,l 3,2 -dianhydride... [Pg.97]

Support for this result was obtained from the taste of 1,5-anhydrohexitols, which, only for purposes of comparison, can be regarded as 1-deoxyal-dopyranoses. 1,5-Anhydro-D-glucitol (that is, the incorrectly named 1-deoxy-D-glucopyranose ) (14), 1,5-anhydro-D-mannitol ( 1-deoxy-D-mannopyranose or 2-deoxy-D-fructopyranose ) (15), and 1,5-anhydro-D-galactitol ( l-deoxy-o-galactopyranose ) (16) are all purely sweet, without any trace of bitterness. Furthermore, the complete absence of bitterness of 1,5-anhydromannitol (16) clearly indicates that the anomeric... [Pg.240]

By application of first-order, kinetic equations, B. Anderson and Degn claimed that an equilibrated (25°) aqueous solution of D-fructose contains 31.56% of jS-D-fructofuranose and 68.44% of -D-fructopyranose. N.m.r. studies, however, showed that, at equilibrium, a solution of D-fructose contains /3-D-fructopyranose, -D-fructofuranose, a-D-fructofuranose, and a trace of a-D-fructopyranose the distribution of these isomers was shown by gas-liquid chromatography to be 76,19.5, and 4%, respectively. Based on Anderson and Degn s result, Shallenberger reasoned that, as 0.68 X 1.8 = 1.22 (which approximates the reported sweetness of mutarotated D-fructose ), the furanose form(s) must possess very little sweetness. [Pg.249]

When Shallenberger and coworkers attempted to explain the sweetness of /8-D-fructopyranose, they intuitively assigned the anomeric 2-hydroxyl group as AH and the oxygen atom of the 2-(hydroxymethyl) substituent as B. This assignment has since been supported by Lindley and Birch. It was shown that 1,5-anhydro-D-mannitol (15, 2-deoxy-D-fructopyranose ) and jS-D-arabinopyranose (22) (in both of which, one of the AH or B units... [Pg.249]

An interesting compound having a structure analogous to that of d-fructopyranose is l,3-dihydroxy-2-propanone ( dihydroxyacetone, 24) ... [Pg.252]


See other pages where D- -Fructopyranose is mentioned: [Pg.291]    [Pg.291]    [Pg.291]    [Pg.224]    [Pg.986]    [Pg.441]    [Pg.62]    [Pg.120]    [Pg.120]    [Pg.143]    [Pg.209]    [Pg.210]    [Pg.211]    [Pg.212]    [Pg.240]    [Pg.254]    [Pg.254]    [Pg.254]    [Pg.254]    [Pg.2079]    [Pg.2310]    [Pg.2390]    [Pg.52]    [Pg.103]    [Pg.8]    [Pg.221]    [Pg.241]    [Pg.242]    [Pg.249]    [Pg.250]    [Pg.250]    [Pg.250]    [Pg.251]    [Pg.252]    [Pg.252]    [Pg.253]   
See also in sourсe #XX -- [ Pg.103 ]

See also in sourсe #XX -- [ Pg.209 ]

See also in sourсe #XX -- [ Pg.23 ]




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