geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The X-ray crystal structure of 2,3:4,5-di-O-isopropylidene-1-O-methyl-beta-D-fructopyranose


, : The X-ray crystal structure of 2,3:4,5-di-O-isopropylidene-1-O-methyl-beta-D-fructopyranose. Carbohydrate Research 197: 33-40

2,3:4,5-Di-O-isopropylidene-1-O-methyl-beta-D-fructopyranose, C13H22O6, Mr = 274.3, orthorhombic, P212121, a = 12.388 (2), b = 13.307 (5), c = 8.660 (1) A, V = 1427.4 (9) A3, Z = 4, Dm = 1.24 g.cm-3, Dx = 1.276 g.cm-3, CuKalpha, lambda = 1.54184 A, mu = 8.0 cm-1, F(000) = 592, T = 295 (1) K, R = 0.032 for 1586 observations (of 1693 unique data). The molecule is a derivative of the naturally occurring carbohydrate D-fructose. The data reported here indicate that the ketose six-membered ring is constrained by the presence of two fused five-membered rings into the 3SO conformation. These findings agree with the n.m.r.-spectroscopic results for 2,3:4,5-di-O-benzylidene-beta-D-fructopyranose. As a result of crystal packing forces, the exocyclic side-chain has a C-C-O-C torsion angle of -102 degrees, quite different from the expected value of 180 degrees.

US$29.90

PMID: 2346950


Other references

Chung, M.Yeon.; Park, Y.Sook.; Ryu, S.Ryul.; Ahn, S.Bong.; Kim, S.Hwan.; Jo, Y.Ju.; Han, J.Kil.; Joo, J.Eun., 2012: A case of colonic mucinous adenocarcinoma in 19-year-old male patient. Colorectal cancer is rare in teenagers, especially without known risk factors. Colon cancer in young age is more likely to be diagnosed at advanced-stage, to present unfavorable tumor histology such as mucinous carcinoma, and poor outcome. We repo...

Seidl, K.; Vater, M.; Rameken, M.; Droegemueller, A.; Brandt, A.; Senges, J., 2003: Acute and long-term thromboembolic events in patients with atrial tachyarrhythmias Comparison between atrial fibrillation, atrial flutter plus atrial fibrillation, and pure atrial flutter. Journal of the American College of Cardiology 41(6 Supplement A): 130A, March 19

Dimitrijević, D., 1975: Amyloid and the eye. Ophthalmologica. Journal International D'ophtalmologie. International Journal of Ophthalmology. Zeitschrift für Augenheilkunde 170(2-3): 180-182

Krupitsky, E.M.; Blokhina, E.A., 2011: Long-acting depot formulations of naltrexone for heroin dependence: a review. The major problem with the oral formulation of naltrexone for heroin dependence is poor compliance (adherence). Long-acting sustained release formulations of naltrexone (implantable and injectable) might help to improve compliance and, thus, incre...

Hirt, F., 1975: Flussregenpfeiferbrut im Zurcher Unterland. Vogel Heimat(2): 34

Eken, C.; Demirci, E.; Sahin, F., 2000: Pathogenicity of the fungi determined on tubers from potato storages in Erzurum, Turkiye. Eight hundred and sixty of 3126 potato tubers from 103 stores in Turkey exhibited disease symptoms and were used for isolation of causative fungi. Twenty-five fungal species were isolated and identified. The most prevalent genera were Fusarium, Rh...

Schneider, E.L.; Carlquist, S., 1996: Vessels in Brasenia New perspectives on vessel origin in primary xylem of angiosperms. Studies by means of scanning electron microscope (SEM) of primary xylem of Nymphaeaceae have revealed diversity in vessels and rudimentary expressions of pore formation on end walls of vessel elements. A similar situation is true in Cabombaceae. I...

Fujita, M.; Oshima, M.; Okuno, S.; Sugimura, T.; Okuyama, T., 2006: Regioselective reactions of 1-alkylidene-2-oxyallyl cations with furan: control of [4 + 3] cycloaddition, [3 + 2] cycloaddition, and electrophilic substitution. The ring opening of alkylidenecyclopropanone acetal under acidic conditions produces the 1-alkylidene-2-oxyallyl cation as an intermediate, which reacts with furan to give the [3 + 2] and [4 + 3] cycloadducts as well as an electrophilic substituti...

Elley, C.Raina.; Kerse, N.; Chondros, P.; Robinson, E., 2005: Intraclass correlation coefficients from three cluster randomised controlled trials in primary and residential health care. This paper provides intraclass correlation coefficients (ICCs) for estimation of sample size inflation required in future cluster randomised trials in primary or residential care. Three cluster randomised trials were conducted among middle-aged an...

Johanson, K.O.; McHenry, C.S., 1982: The beta subunit of the DNA polymerase III holoenzyme becomes inaccessible to antibody after formation of an initiation complex with primed DNA. The initiation of the DNA polymerase III holoenzyme-catalyzed reaction is blocked by antibody directed against the beta subunit; elongation is unaffected (Johanson, K., and McHenry, C. (1980) J. Biol. Chem. 255, 10984-10990). We have developed an...