使用P 2 O 5 / KI用醇对嘌呤,嘧啶和唑衍生物进行一锅N-烷基化的无三苯膦的方法:一种简便且选择性的途径,可获取碳环核苷
摘要:
描述了一种使用P 2 O 5和KI的混合物通过醇通过一锅法对核碱基和其他相关N-杂环进行N-烷基化的简便,选择性和温和的合成方法。使用P 2 O 5 / KI和Et 3 N / K 2 CO 3的碱性混合物,使结构不同的嘌呤,嘧啶和/或唑与伯醇反应在回流中,DMF以良好至合理的产率得到相应的N-烷基衍生物(碳环核苷)。评估了包括溶剂,碱,温度和底物/试剂比率的不同参数对反应进程的影响。仲和叔醇不能与核碱基反应。当前方案的主要优点是形成水溶性副产物,其中提供了简单的后处理和纯化过程。
Solid-liquidPTC without added organic solvent promotes alkylation of purine derivatives leading in particular to an efficient synthesis of the antiviral DHPA. The location of the substituent on the ring was determined by analysis of coupling interactions through 2D δ-δ heteronuclear 1H 13C correlated NMR spectroscopy.
不添加有机溶剂的固液PTC促进嘌呤衍生物的烷基化,尤其导致抗病毒DHPA的有效合成。环上取代基的位置是通过2Dδ-δ杂核1 H 13 C相关NMR光谱分析耦合相互作用来确定的。
Synthesis, Structure, and Reactivity of Aliphatic Primary Nitrosamines Stabilized by Coordination to [IrCl<sub>5</sub>]<sup>2−</sup>
作者:Florencia Di Salvo、Darío A. Estrin、Gregory Leitus、Fabio Doctorovich
DOI:10.1021/om700985h
日期:2008.5.1
understand the role of the coordination environment of these complexes and to support, with excellent correlation with the experimental data, the proposed reaction pathways and stability studies. Complexes containing the highly unstable primary nitrosamines as ligands are generally scarce, and moreover, to our knowledge, our group has recently reported the first examples of isolated primary nitrosamines coordinated
The disclosure provides compounds having formula (I):
and the pharmaceutically acceptable salts thereof, wherein R1, R2, R2′, and X are as defined as set forth in the specification. Compounds having formula (I) are prodrugs that release glutamine analogs, e.g., 6-diazo-5-oxo-L-norleucine (DON). The disclosure also provides compounds having formula (I) for use in treating cancer.