SELECTIVE RING-OPENING POLYMERIZATION OF 1, 4-ANHYDRO-2, 3-O-CYCLOHEXYLIDENE-α-D-RIBOPYRANOSE AND COPOLYMERIZATION OF 1, 4-ANHYDRO-2, 3-O-CYCLOHEXYLIDENE-α-D-RIBOPYRANOSE WITH 1, 4-ANHYDRO-2, 3-O-BENZYLIDENE-α-D-RIBOPYRANOSE
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چکیده
منابع مشابه
1-(1-Carboxymethyl-1,4-anhydro-2,3-O-isopropylidene-α-d-erythrofuranosyl)thymine
X-Ray crystallography unequivocally determined the stereochemistry of the thymine base in the title compound, C(14)H(18)N(2)O(7). The absolute stereochemistry was determined from the use of d-ribose as the starting material. There are two independent mol-ecules in the asymmetric unit (Z' = 2) which exist as N-H⋯O hydrogen-bonded pairs in the crystal structure.
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In the title compound, C14H21N3O5, the tetra-hydro-furan ring adopts an envelope conformation with the C atom bearing the substituent as the flap. The penta-furan-ose ring adopts a twisted conformation about the C-C bond fusing the rings. The dihedral angle between these rings (all atoms), which are cis fused, is 72.89 (14)°. The cyclo-propane ring is disordered over two orientations in a 0.576...
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The price process of real assets, in particular real estate, is of interest to financial economists for a number of reasons. For example, since real estate is often used as collateral for loans that are used for other types of corporate investments, changes in real estate prices can affect the level of investment expenditures more generally. This relation between real estate prices and corporat...
متن کامل1,5-Anhydro-2-deoxy-1,2-C-dichloromethylene-3,4,6-tri-O-(4-methoxybenzyl)-d-glycero-d-gulo-hexitol
The pyranosyl ring in the title compound, C(31)H(34)Cl(2)O(7), adopts a twist-boat conformation. The 4-meth-oxy-benzyl groups are located in equatorial positions with the meth-oxy groups nearly coplanar with their respective rings [dihedral angles of 0.2 (3) and 9.4 (2)°]. The aromatic rings adopt orientations enabling them to participate in C-H⋯π inter-actions with neighboring meth-oxy groups....
متن کاملSynthesis of 3-O- and 4-O-(2-aminoethylphosphono) derivatives of methyl l-glycero-α-d-manno-heptopyranoside
ABSTRACT Phosphoethanolamine derivatives of the bacterial saccharide l-glycero-d-manno-heptose have been prepared using a phosphoramidite-based coupling reaction at position 4 of a side-chain-protected 2,3-O-orthoester methyl heptoside and at position 3 of a 3,4-diol heptoside, respectively. Global deprotection afforded the corresponding 2-aminoethylphosphodiester derivatives as substrates for ...
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ژورنال
عنوان ژورنال: Sen'i Gakkaishi
سال: 1984
ISSN: 0037-9875,1884-2259
DOI: 10.2115/fiber.40.11_t439