Results 181 to 190 of about 8,043 (217)

Selective deacylation of peracylated ribonucleosides

Tetrahedron Letters, 2009
Abstract A protocol for chemoselective deprotection of N,O-acylated ribonucleosides has been developed. Peracylated pyrimidine ribonucleosides subjected to guanidinium nitrate and NaOMe in MeOH/CH 2 Cl 2 at 0 °C undergo high yielding O-deacylation, while even more pronounced chemoselectivity is observed with peracylated purine ribonucleosides as O5′-
Jared W. Rigoli, Michael E. Østergaard, Kirsten M. Canady, Dale C. Guenther, Patrick J. Hrdlicka   +4 more
openaire   +1 more source

[18] Ribonucleoside cyclic phosphates

1967
Publisher Summary This chapter discusses ribonucleoside cyclic phosphates and their methods of preparation. Ribonucleoside cyclic phosphates refer to the 2', 3'-monophosphate esters of nucleosides. They are originally isolated as intermediates during the enzymatic or mild alkaline degradations of ribonucleic acids, and independently and ...
openaire   +1 more source

2-Fluoropurine ribonucleosides

Journal of Medicinal Chemistry, 1970
J A, Montgomery, K, Hewson
openaire   +2 more sources

2′--acyl ribonucleoside derivatives

Tetrahedron Letters, 1965
C B, Reese, D R, Trentham
openaire   +2 more sources

2'-C-branched ribonucleosides. 2. Synthesis of 2'-C-beta-trifluoromethyl pyrimidine ribonucleosides.

Organic letters, 2001
[structure: see text]. The first synthesis of 2'-C-beta-trifluoromethyl pyrimidine ribonucleosides is described. 1,2,3,5-Tetra-O-benzoyl-2-C-beta-trifluoromethyl-alpha-D-ribofuranose (3) is prepared from 1,3,5-tri-O-benzoyl-alpha-D-ribofuranose (1) in three steps and converted to 3,5-di-O-benzoyl-2-C-beta-trifluoromethyl-alpha-D-1-ribofuranosyl bromide
N S, Li, X Q, Tang, J A, Piccirilli
openaire   +1 more source

[116] Mammalian pyridine ribonucleoside phosphokinase

1971
Publisher Summary Enzyme activity may be assayed by measuring the formation of nicotinate ribonucleotide with nicotinate-7- 14 C ribonucleoside and adenosine triphosphate (ATP) as substrates. The radioactive ribonucleotide produced is isolated by a small Dowex 50 column and is determined using a Geiger-Muller gas-flow counter. This chapter focuses on
Yasutomi Nishizuka, Osamu Hayaishi
openaire   +1 more source

Ribonucleoside diphosphate reductase

Journal of Molecular Biology, 1969
Neal C. Brown, Peter Reichard
openaire   +1 more source

Simplified diethylaminoethylcellulose chromatography of ribonucleosides

Analytical Biochemistry, 1971
J, MacGee, B H, Smith
openaire   +2 more sources

Acyl migration in ribonucleoside derivatives

Tetrahedron Letters, 1965
C B, Reese, D R, Trentham
openaire   +2 more sources

Synthesis of ribonucleoside-5′-polyphosphates

Biochimica et Biophysica Acta, 1960
D, KESSLER, B, MOSS, R W, CHAMBERS
openaire   +2 more sources