. "69" . "RIV/60461373:22330/04:00012832" . "The kinetics of methylation of methyl 5-deoxy-?-D-xylofuranoside (1), methyl 5-deoxy-\u00DF-D-xylofuranoside (2) and their partly methylated derivatives with methyl iodide in the presence of sodium hydroxide in acetonitrile was studied. The reaction rate was independent of the base concentration during the first half-time only and the methylation proceeded as a first-order reaction. The rate constants of all side and consecutive reactions were calculated and the influence of both polar and steric effect is discussed. The methylation of 1 was highly regioselective giving almost exclusively 5-deoxy-2-O-methyl-?-D-xylofuranoside."@en . "Collection of Czechoslovak Chemical Communications" . . . . "Regioselectivity;Rate constants;Partial methylation;Methyl pentofuranoside;"@en . "Kinetics of methylation of methyl 5-deoxy- / -D-xylofuranosides" . . "1"^^ . . . "Kinetika methylace methyl 5-deoxy- / -D-xylofuranosid\u016F"@cs . "22330" . "Byla sledov\u00E1na kinetika methylace methyl-5-deoxy-?-D-xylofuranosidu, methyl-5-deoxy-\u00DF-D-xylofuranosidu a jejich methylether\u016F methyljodidem v acetonitrilu za p\u0159\u00EDtomnosti hydroxidu sodn\u00E9ho. Byly spo\u010D\u00EDt\u00E1ny rychlostn\u00ED konstanty v\u0161ech n\u00E1sledn\u00FDch a konkuren\u010Dn\u00EDch reakc\u00ED a vyhodnoceny sterick\u00E9 a pol\u00E1rn\u00ED vlivy."@cs . . . "Kinetika methylace methyl 5-deoxy- / -D-xylofuranosid\u016F"@cs . "2"^^ . "[5BFFC1603C8C]" . "Kinetics of methylation of methyl 5-deoxy- / -D-xylofuranosides"@en . "1877-1888" . . . "RIV/60461373:22330/04:00012832!RIV/2005/MSM/223305/N" . . . "O\u0161\u010Dendov\u00E1, M." . "12"^^ . . "CZ - \u010Cesk\u00E1 republika" . "Moravcov\u00E1, Jitka" . "0010-0765" . "Neuveden" . "570097" . "Z(MSM 223300006)" . "The kinetics of methylation of methyl 5-deoxy-?-D-xylofuranoside (1), methyl 5-deoxy-\u00DF-D-xylofuranoside (2) and their partly methylated derivatives with methyl iodide in the presence of sodium hydroxide in acetonitrile was studied. The reaction rate was independent of the base concentration during the first half-time only and the methylation proceeded as a first-order reaction. The rate constants of all side and consecutive reactions were calculated and the influence of both polar and steric effect is discussed. The methylation of 1 was highly regioselective giving almost exclusively 5-deoxy-2-O-methyl-?-D-xylofuranoside." . "Kinetics of methylation of methyl 5-deoxy- / -D-xylofuranosides"@en . . "Kinetics of methylation of methyl 5-deoxy- / -D-xylofuranosides" . .