Synthesis of L-Dioxolane Nucleosides and Related Chemistry
作者:Chengyi Liang、Doo Won Lee、M. Gary Newton、Chung K. Chu
DOI:10.1021/jo00111a012
日期:1995.3
(+)-L- or (+)-(2R,4S)-1-[4-(hydroxymethyl)-1,3-dioxolan-2-yl]-5-fluorouracil (25) and other novel classes of 1,3-dioxolane nucleosides have been synthesized. Coupling of 2-methoxy-4-[[(tert-butyldiphenylsilyl)oxy]methyl]-1,3-dioxolane (23) or 2-methyl-1,3-dioxolane (9) with silylated g-fluorouracil, thymine, cytosine, and 5-chlorocytosine in the presence of TMSOTf gave the corresponding 1,3-dioxolane nucleosides. These nucleosides were decomposed and rearranged to the ring-opened products in certain reaction conditions. It was found that 5-fluorouricil nucleosides (12 and 25) were relatively more stable than the thymine or cytosine derivatives (10, 13, and 16). Bulky protecting group (TBDPS) at the 1,3-dioxolane moiety in compound 24 may also contribute the stability to the 1,3-dioxolane nucleosides. The structures of these novel 1,3-dioxolane nucleosides and ring-opened products have been assigned by NMR spectra, and the mechanisms of decomposition and rearrangement to the ring opened products were discussed.
Poly(lactic acid)/poly(ethylene glycol) supramolecular diblock copolymers based on three-fold complementary hydrogen bonds: Synthesis, micellization, and stimuli responsivity
作者:Xiaohua Chang、Chenlei Ma、Guorong Shan、Yongzhong Bao、Pengju Pan
DOI:10.1016/j.polymer.2016.03.015
日期:2016.5
supramolecular amphiphilic diblock copolymers in solution through the thymine/diaminotriazine complementary hydrogenbonding interactions. Such supramolecular copolymers self-assemble into the stimuli-responsive micelles in aqueous solution. Micelle size, crystalline state, stimuli responsibility, drug loading and release behavior of the supramolecular micelles can be readily tuned from the block length,
Synthesis and Antiviral Evaluation of D4T Analogues with a Spacer Arm Between Glucidic and Base Moieties
作者:Vincent Roy、Rachida Zerrouki、Pierre Krausz、Sylvie Schmidt、Anne Marie Aubertin
DOI:10.1081/ncn-200031457
日期:2004.1.1
The synthesis of a series of d4T analogues bearing an acyclic chains between the sugar and the base moities, is described. New compounds were obtained readily using microwave irradiation and selective deprotection of sugar part. The compounds were characterized by 1H NMR and IR spectroscopy. Antiviral (HIV‐1) properties of these compounds were examined.
Synthesis and Antiviral Evaluation of Azt Analogues with A Spacer Arm Between Glucidic and Base Moieties. Part II
作者:Vincent Roy、Rachida Zerrouki、Pierre Krausz、Géraldine Laumond、Anne Marie Aubertin
DOI:10.1080/15257770701426153
日期:2007.6.15
This article describes the synthesis of a series of AZT analogues bearing an acyclic chain between the sugar and the base moieties is described. These new compounds were readily obtained using microwave irradiation. The compounds were characterized by (1)H NMR and IR spectroscopy. Antiviral (HIV-1) properties of these compounds were examined.
本文描述了一系列在糖和碱基部分之间带有无环链的AZT类似物的合成。这些新化合物很容易通过微波辐射获得。通过(1)1 H NMR和IR光谱对化合物进行表征。检查了这些化合物的抗病毒(HIV-1)特性。
Photodimerizations and Crystal Structures of Thymine Derivatives Having a Long Alkyl Chain Connected with a Carbamate Bond
Photodimerizations of thymine derivatives having a long alkyl chain on a carbamate bond were investigated by irradiation of UV light at 280 nm in amorphous and crystalline film states. The amorphous films obtained by spin-coating from chloroform solution had higher initial rate constants for photodimerization relative to those of the crystalline films after annealing. X-Ray crystal structure analysis