Novel syntheses of (Z)-alkene and alkane base-modified nucleosides
作者:Sarah E Lee、Joseph S Vyle、David M Williams、Jane A Grasby
DOI:10.1016/s0040-4039(99)02029-8
日期:2000.1
The syntheses of 5-(Z)-(3-aminoallyl)- and 5-(3-aminopropyl)-substituted 2 '-deoxyuridine and 2 '-deoxycytidine are reported. These compounds were derived from the corresponding 5-propargylamine derivative. [Hobbs, F. W. J. Org. Chem. 1989, 52, 3420.] The catalyst we have employed for these reductions is a NiCl2/NaBH4 system, which we have found to be superior to the more conventional palladium-catalysts previously reported with similar compounds. (C) 1999 Elsevier Science Ltd. All rights reserved.
7,8-Dihydropyrido[2,3-d]pyrimidin-2-one; a bicyclic cytosine analogue capable of enhanced stabilisation of DNA duplexes
作者:Takayuki Shibata、Niklaas J. Buurma、John A. Brazier、Peter Thompson、Ihtshamul Haq、David M. Williams
DOI:10.1039/b606058g
日期:——
Incorporation of a bicyclic cytosine analogue, 3-β-D-(2′-deoxyribofuranosyl)-7,8-dihydropyrido[2,3-d]pyrimidine, into synthetic DNA duplexes results in a greatly enhanced thermal stability (3–4 °C per modification) compared to the corresponding unmodified duplex.
将双环胞嘧啶类似物 3-β-D-(2′-deriboxyofuranosyl)-7,8- 二氢吡啶并[2,3-d]嘧啶掺入合成 DNA 双链后,其热稳定性(每次修饰 3-4 °C)比相应的未修饰双链大大提高。