Synthesis of nitrogen-15-labeled 2-amino(glycofurano)oxazolines via glycosylamine intermediates
作者:Robert M. Davidson、Edward White、Sam A. Margolis、Bruce Coxon
DOI:10.1016/0008-6215(83)88113-0
日期:1983.6
Abstract A new, efficient synthesis of doubly 15N-labeled 2-amino-oxazoline derivatives of pentoses and hexoses has been delineated that involves treatment either of unprotected or O-isopropylidenated glycosylamines with cyanamide-15N2 in methanol to give 2-amino(glycofurano)oxazolines-15N2. A probable mechanism for these reactions is presented. These techniques provide a practical means by which a
Direct Assembly of Nucleoside Precursors from Two- and Three-Carbon Units
作者:Carole Anastasi、Michael A. Crowe、Matthew W. Powner、John D. Sutherland
DOI:10.1002/anie.200601267
日期:2006.9.18
Holy,A., Collection of Czechoslovak Chemical Communications, 1973, vol. 38, p. 428 - 437
作者:Holy,A.
DOI:——
日期:——
Synthesis of 6-methyluracil nucleosides from pentafuranose aminooxazolines and diketene
作者:I. A. Drizina、D. Ya. Sniker、�. �. Liepin'sh、�. I. Stankevich
DOI:10.1007/bf00469872
日期:1978.8
Chemoselective Multicomponent One-Pot Assembly of Purine Precursors in Water
作者:Matthew W. Powner、John D. Sutherland、Jack W. Szostak
DOI:10.1021/ja108197s
日期:2010.11.24
The recent development of a sequential, high-yielding route to activated pyrimidine nucleotides, under conditions thought to be prebiotic, is an encouraging step toward the greater goal of a plausible prebiotic pathway to RNA and the potential for an RNA world. However, this synthesis has led to a disparity in the methodology available for stepwise construction of the canonical pyrimidine and purine nucleotides. To address this problem, and further explore prebiotically accessible chemical systems, we have developed a high-yielding, aqueous, one-pot, multicomponent reaction that tethers masked-sugar moieties to prebiotically plausible purine precursors. A pH-dependent three-component reaction system has been discovered that utilizes key nucleotide synthons 2-aminooxazole and 5-aminoimidazoles, which allows the first divergent purine/pyrimidine synthesis to be proposed. Due to regiospecific aminoimidazole tethering, the pathway allows N9 purination only, thus suggesting the first prebiotically plausible mechanism for regiospecific N9 purination.