✦ LIBER ✦

The x-ray crystal structure of 2,3:4,5-di-O-isopropylidene-1-O-methyl-β-d-fructopyranose

✍ Scribed by S.F. Watkins; S.J. Kim; F.R. Fronczek; R.J. Voll; E.S. Younathan

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 438 KB
Volume: 197
Category: Article
ISSN: 0008-6215
DOI: 10.1016/0008-6215(90)84127-g

No coin nor oath required. For personal study only.

✦ Synopsis

The molecule is a derivative of the naturally occurring carbohydrate D-fNCtOSe. 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-0-benzylidene-/3-D-fructopyranose.

As a result of crystal packing forces, the exocyclic side-chain has a C-C-O-C torsion angle of -102", quite different from the expected value of 180".

📜 SIMILAR VOLUMES

ChemInform Abstract: 3,4-Anhydro-1,2-O-i

ChemInform Abstract: 3,4-Anhydro-1,2-O-isopropylidene-β-D-tagatopyranose and 4,5-Anhydro-1,2-O-isopropylidene-β-D-fructopyranose.

✍ Masoud Ataie; J. Grant Buchanan; Alan R. Edgar; Richard G. Kinsman; Maria Lyssik 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 34 KB 👁 1 views

The crystal structure of methyl 5-O-acet

The crystal structure of methyl 5-O-acetyl-2-O-benzo1-3,4-O-isopropylidene-β-l-idoseptanoside

✍ Carol J. Bailey; Donald C. Craig; Colin T. Grainger; Veronica J. James; John D. 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 264 KB

Vicinal proton-proton spin-coupling constants for methyl 5-O-acetyl-2-O-benzoyl-3,4-O-isopropylidene-fl-L-idoseptanoside (1) have led to the assignment [1] of the twist-chair conformation, °'ITC2, 3 [2], for the seven-membered ring in 1 in which the pseudo-axis of symmetry passes through C-5. Since

X-ray and conformational investigation o

X-ray and conformational investigation of 6-deoxy-6-C-(1,5-di-O-acetyl-2,3-O-isopropylidene-β-d-allo-pentofuranos-5-yl)-1,2:3,4-di-O-isopropylidene- α-d-galactopyranose and 6-C-(benzyl 5-deoxy-2,3-O-isopropylidene-β-d-ribofuranosid-5-yl)-1,2:3,4-di-O-isopropylidene- d-glycero-α-d-galacto-hexopyranose

✍ Janusz W. Krajewski; Wojciech Karpiesiuk; Anna Banaszek 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 523 KB

The structures of the title compounds (2b and 3) have been investigated in the solid state by X-ray methods. The crystals of 2b are monoclinic, space group P2,, and of 3 orthorhombit, space grtup P2,2,2,. The cell dimensions are: for 2b, a = 9.910(2), b = 11;745W, c = 11.810(3) A, /3 = 97.32(l)"; a

An n.m.r. analysis of 1,2-O-isopropylide

An n.m.r. analysis of 1,2-O-isopropylidene-3-O-methyl-α-d-allofuranose and 1,2:5,6-di-O-isopropylidene-3-O-methyl-α-d-allofuranose, and the X-ray structure of the former

✍ Elizabeth Lee; Noeleen Melody; Patrick McArdle; Desmond Cunningham 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 216 KB

Catalytic, Stereoselective Glycosylation

Catalytic, Stereoselective Glycosylation—Spiroketalization of 3,4,5-Tri-O-benzyl-β-D-fructopyranose Generating Di-D-fructopyranose-1,2′-2,1′-dianhydride.

✍ Eisuke Kaji; Reiko Saiga; Emiko Kurimoto; Takashi Nishino 📂 Article 📅 2007 🏛 John Wiley and Sons ⚖ 21 KB

Selective Ruthenium-Catalyzed Oxidation

Selective Ruthenium-Catalyzed Oxidation of 1,2:4,5-Di-O-isopropylidene-β-D-fructopyranose and Other Alcohols with NaOCl.

✍ Luca Gonsalvi; Isabel W. C. E. Arends; Roger A. Sheldon 📂 Article 📅 2002 🏛 John Wiley and Sons ⚖ 33 KB 👁 1 views