161365-10-2Relevant academic research and scientific papers
Stereoselectivity in deoxygenation of 5-hydroxy-5-phosphinyl-hexofuranoses (α-hydroxyphosphonates)
Hanaya, Tadashi,Sugiyama, Ken-Ichi,Kawamoto, Heizan,Yamamoto, Hiroshi
, p. 1641 - 1650 (2007/10/03)
The addition of dimethyl phosphonate to six different hexofuranos-5-uloses in the presence of DBU, followed by esterification with methoxalyl chloride and then radical reduction, afforded 5-deoxy-5-dimethoxyphosphinyl-D- and L-hexofuranoses. The stereosel
A new route for preparation of 5-deoxy-5-(hydroxyphosphinyl)-D-mannopyranose and -L-gulopyranose derivatives
Hanaya, Tadashi,Yamamoto, Hiroshi
, p. 2608 - 2618 (2007/10/03)
Starting from methyl 2,3-O-isopropylidene-α-D-mannofuranoside (5), methyl 6-O-benzyl-2,3-O-isopropylidene-α-D-lyxo-hexofuranosid-5-ulose (12) was prepared in three steps. The addition reaction of dimethyl phosphonate to 12, followed by deoxygenation of 5-
Elongation of the pentose chain at the terminal carbon atom with Grignard C1 reagents. A study of the homologation reaction
Stepowska, Halszka,Zamojski, Aleksander
, p. 5519 - 5538 (2007/10/03)
Derivatives of four stereoisomeric pentodialdo-1,4-furanoses were reacted with four Grignard C1 reagents: methoxymethyl-, allyloxymethyl-, benzyloxymethyl, and dimethylphenylsilylmethyl-magnesium chlorides. Derivatives of the expected stereoisomeric hexoses were accompanied in some cases by C-4 inverted products. The results have been discussed in terms of α- and β-chelated transition states. It has been found that the RX (X=O,Si) grouping of the Grignard reagent strongly influences the stereochemical outcome of the elongation reaction.
A convenient preparation of 5-benzyl ethers of D-gluco- and D-manno-furanose derivatives
Stepowska, Halszka,Zamojski, Aleksander
, p. 133 - 138 (2007/10/02)
Keywords: Glucofuranose; Mannofuranose; Selective benzylation; Two-phase benzylation
