Synthesis of nucleoside 5'-O-(1,3-dithiotriphosphates) and 5'-O-(1,1-dithiotriphosphates)
摘要:
The synthesis of 3'-deoxy-3'-azidothymidine 5'-O-(1,3-dithiotriphosphate) (5) as the first example of a nucleoside 5'-O-(1,3-dithiotriphosphate) is described. 2-Chloro-4H-1,3,2-benzodioxaphosphorin-4-one phosphitylates the 5'-hydroxy group of 3'deoxy-3'-azidothymidine to form intermediate 1. Reaction of 1 with thiopyrophosphate (9) and sulfur results in the formation of an unseparable mixture of 3'-deoxy-3'-azidothymidine 5'-O-(1,3-dithiotriphosphate) (5) and 3'-deoxy-3'-azidothymidine 5'-O-(1,2-dithiotriphosphate) (3). Selective hydrolysis of 5 allows isolation of 3. However, reaction of 1 with P1-O-(cyanoethyl)-P1-thiopyrophosphate (8) and sulfur produced the diastereomers of 5 in good yield. Compound 8 is prepared by reaction of 3-hydroxyproprionitrile with 2-chloro-4H-1,3,2-benzodioxaphosphorin-4-one, pyrophosphate, and sulfur to yield 10, which is ring opened to 8 by reaction with ethylenediamine. Hydrolysis of this compound leads to 9. An alternative route to nucleoside 5'-O-(1,3-dithiotriphosphates) consists of reacting a nucleoside 5'-O-(1-thiocyclotriphosphate) such as 13 with Li2S. This reaction, when performed in pyridine/dioxane, leads to a mixture of the nucleoside 5'-O-(1,3-dithiotriphosphate) and the nucleoside 5'-O-(1,1-dithiotriphosphate). The latter is the only nucleotide product when the reaction is carried out in DMF.
and convenient synthetic protocols based on H-phosphonate chemistry have been developed for the preparation of nucleoside 5′-diphosphates. It consists of oxidation of the silylated H-phosphonate monoesters in pyridine with iodine to produce the corresponding N-pyridiniumphosphonate intermediates, followed by their reactions with orthophosphoric acid used as a nucleophile. The added value of the method
Synthesis of α-P-Modified Nucleoside Diphosphates with Ethylenediamine
作者:Ping Li、Zhihong Xu、Hongyan Liu、Charlotta K. Wennefors、Mikhail I. Dobrikov、János Ludwig、Barbara Ramsay Shaw
DOI:10.1021/ja055179y
日期:2005.12.1
a one-pot synthesis of α-P-borano-, α-P-thio-, and α-P-seleno-modified nucleosidediphosphate analogues that are otherwise difficult to obtain. The key step involves the intramolecular nucleophilic attack by an amino group in 5 to remove the γ-phosphate. The absolute configurations of P-diastereomers were confirmed by analysis of their 1H NMR. Affinity studies revealed that the nucleoside boranodiphosphates
synthesize the set of ribonucleoside (A, U, G, and C) 5'-(alpha-P-borano)triphosphates. Phosphitylation of the 2',3'-protected ribonucleoside with 2-chloro-4H-1,3,2-benzodioxaphosphorin-4-one gives the 5'-phosphite intermediate 2 which undergoes in situ substitution in the presence of pyrophosphate to give the cyclic intermediate, P(2),P(3)-dioxo-P(1)-ribonucleosidylcyclotriphosphate 3. Immediate oxidation
New 5′-(Pα-boronated) analogues of the naturally occurring nucleoside diphosphates ADP and GDP were synthesized in good yields, i.e., adenosine 5′-(Pα-boranodiphosphate) (ADPαB; 5a) and guanosine 5′-(Pα-boranodiphosphate) (GDPαB; 5b). Their diastereoisomers were successfully separated by reversed-phase HPLC, and chemical structures were established via spectroscopic methods. The isoelectronic substitution
以高产率合成了天然存在的二磷酸核苷 ADP 和 GDP 的新 5'-(Pα-硼化) 类似物,即腺苷 5'-(Pα-硼酸二磷酸) (ADPαB; 5a) 和鸟苷 5'-(Pα-硼酸二磷酸) ) (GDPαB; 5b)。通过反相高效液相色谱法成功分离了它们的非对映异构体,并通过光谱方法建立了化学结构。用硼烷 (BH3) 等电子取代磷酸二酯中的一个非桥接 O 原子应该会增加 ADPαB 和 GDPαB 的亲脂性和极性变化。硼化核苷二磷酸可用于研究涉及 ADP 和 GDP 的酶促反应的立体化学过程和金属需求,并作为 10B 的载体用于治疗癌症的硼中子俘获疗法 (BNCT)。