Nucleotides. Part XXXI. Modified Oligomeric 2?-5? A Analogues: Synthesis of 2?-5? oligonucleotides with 9-(3?-azido-3?-deoxy-?-D-xylofuranosyl)adenine and 9-(3?-amino-3?-deoxy-?-D-xylofuranosyl)adenine as modified nucleosides
lo form the 2′–5′ trimers 21, 22, and 25 and the tetramer 23. Catalytic reduction of the azido groups in [9-(3′-azido-3′-deoxy-β-D-xylofuranosyl)adenine]2′-yl-[2′-(Op-ammonio) 5′]-[9-(3′-azido-3′-deoxy-β-D-xylofuranosyl)adenin]-2′-yl-[2′-(Op-ammonio) 5′]-9-(3′-azido-3′-deoxy-β-D-xylofuranosyl)adenine (21) led to the corresponding 9-(3′-amino-3′-deoxy-β-D-xylofuranosyl)-adenine 2′–5′ trimer 26 in which
通过磷酸三酯法合成了一系列带有9-(3'-叠氮基-3'脱氧-β-D-木呋喃糖基)腺嘌呤部分作为结构单元的新的2'-5'寡核苷酸。使用2-(4-硝基苯基)乙基(npe)和2-(4-硝基苯基)乙氧基羰基(npeoc)磷酸酯,氨基和羟基保护基团可确保以高收率直接合成,并且易于对2进行解封5'三聚体21,22,和25和四聚体23。[9-(3'-azido-3'-deoxy-β-D- xyfurfuranosyl)Adenine ] 2'-yl- [2'-(O p -ammonio)5']-[9的叠氮基催化还原-(3'-叠氮基-3'-脱氧-β-D-木呋喃糖基)腺嘌呤] -2'-基-[2'-(O p-氨)5']-9-(3'-叠氮基3'-脱氧-β-D-木呋喃糖基)腺嘌呤(21)生成相应的9-(3'-氨基-3'-脱氧-β-D -xyfurfuranosyl)-腺嘌呤2'-5'三聚体26,其中两个核苷酸间键被分子内甜菜碱形成而被中和。
1-Monophosphate esters, 1,3-bisphosphate esters and cyclic phosphate esters of 9-(1,3-dihydroxy-2-propoxymethyl)-guanine as antiviral agents
申请人:SYNTEX (U.S.A.) INC.
公开号:EP0105486A2
公开(公告)日:1984-04-18
1-Monophosphate esters, 1,3-bisphosphate esters and cyclic phosphate esters of 9-(1,3-dihydroxy-2-propoxymethyl)guanine are useful as antiviral agents.
Verbindungen der Formel
sind Phosphorylierungsreagenzien, die mit acylierbaren Wasserstoffatomen unter Abspaltung des Amins HNR3R4 reagieren. Die erhaltenen Verbindungen werden zu den entsprechenden Phosphat-, Thiophosphat- oder Selenophosphatderivaten oxidiert und dann die Reste R1 und R2 mit Basen abgespalten. Die chemische Natur der Reste R1, R2, R3 und R4 richtet sich dementsprechend nach diesen Forderungen der Abspaltbarkeit.
Benzoylresorcinol-based phosphate ester compounds as flame retardants
申请人:Durairaj B. Raj
公开号:US20060063865A1
公开(公告)日:2006-03-23
Benzoylresorcinol-based phosphate esters are obtained by reacting a benzoylresorcinol compound with a chlorophosphate. The benzoylresorcinol-based phosphate esters can function as flame retardants and/or UV stabilizers for polycarbonates (PC), poly(phenylene oxide) (PPO), polyesters (e.g., PET and PBT), polycarbonate and acrylonitrile-butadiene-styrene terpolymer (PC/ABS) blends, poly(phenylene oxide) and high-impact polystyrene (PPO/HIPS) blends and other polymers. The benzoylresorcinol-based phosphate ester flame retardants may possess enhanced thermal stability compared to resorcinol based phosphate ester (RDP). Synthetic procedures and applications of the benzoylresorcinol-based phosphate esters compounds are provided.
苯甲酰间苯二酚基磷酸酯是通过苯甲酰间苯二酚化合物与氯磷酸酯反应而得到的。苯甲酰间苯二酚基磷酸酯可作为阻燃剂和/或紫外线稳定剂,用于聚碳酸酯(PC)、聚环氧苯烯烃(PPO)、聚酯(如 PET 和 PBT)、聚碳酸酯和丙烯腈-丁二烯-苯乙烯三元共聚物(PC/ABS)混合物、聚环氧苯烯烃和高抗冲聚苯乙烯(PPO/HIPS)混合物以及其他聚合物。与间苯二酚基磷酸酯(RDP)相比,苯甲酰基间苯二酚基磷酸酯阻燃剂可能具有更高的热稳定性。本文还介绍了苯甲酰基间苯二酚基磷酸酯化合物的合成过程和应用。
HERDEWIJN, PIET;CHARUBALA, RAMAMURTHY;PFLEIDERER, WOLFGANG, HELV. CHIM. ACTA, 72,(1989) N, C. 1729-1738
作者:HERDEWIJN, PIET、CHARUBALA, RAMAMURTHY、PFLEIDERER, WOLFGANG