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。
8-Bromo-9-alkyl adenine derivatives as tools for developing new adenosine A2A and A2B receptors ligands
作者:Catia Lambertucci、Ippolito Antonini、Michela Buccioni、Diego Dal Ben、Dhuldeo D. Kachare、Rosaria Volpini、Karl-Norbert Klotz、Gloria Cristalli
DOI:10.1016/j.bmc.2009.02.030
日期:2009.4
Importance of making available selective adenosine receptor antagonists is boosted by recent findings of adenosine involvement in many CNS dysfunctions. In the present work a series of 8-bromo-9-alkyl adenines are prepared and fully characterized in radioligand binding assays or functional cyclase experiments in respect to their interaction with all the four adenosine receptor subtypes. Results show that the presence of the bromine atom in 8-position of 9-substituted adenines promotes in general the interaction with the adenosine receptors, in particular at the A(2A) subtype. The present study also demonstrates that adenine derivatives could be a good starting point to obtain selective adenosine A(2B) receptor antagonists. (c) 2009 Elsevier Ltd. All rights reserved.
PLATZER, N.;GALONS, H.;BENSAID, Y.;MIOCQUE, M.;BRAM, G., BIO - ORG. HETEROCYSLES, 1986: SYNTH., MECH. AND BIOACTIV.: PROC. 4TH FEC+
作者:PLATZER, N.、GALONS, H.、BENSAID, Y.、MIOCQUE, M.、BRAM, G.
DOI:——
日期:——
PLATZER N.; GALONS H.; BENSAID Y.; MIOCQUE M.; BRAM G., TETRAHEDRON, 43,(1987) N 9, 2101-2108
作者:PLATZER N.、 GALONS H.、 BENSAID Y.、 MIOCQUE M.、 BRAM G.
DOI:——
日期:——
Synthesis of<i>N</i>-Alkenylpurines by Rearrangements of the Corresponding<i>N</i>-Allyl Isomers: Scopes and Limitations
作者:Jindrich Kania、Lise-Lotte Gundersen
DOI:10.1002/ejoc.201201455
日期:2013.4
N-7-alkenylpurines have been synthesized by rearrangement of the corresponding N-allyl derivatives, often in good yields and with high stereoselectivity. Base promoted and transition metal mediated rearrangements have been studied. Simple allylpurines were easily rearranged with catalytic amounts of RuClH(CO)(PPh3)3. The efficiency of base promoted rearrangement was highly dependent on the detailed structure
N-9- 和 N-7- 烯基嘌呤是通过相应的 N-烯丙基衍生物的重排合成的,通常具有良好的产率和高立体选择性。已经研究了碱促进和过渡金属介导的重排。简单的烯丙基嘌呤很容易与催化量的 RuClH(CO)(PPh3)3 重排。碱促进重排的效率高度依赖于起始材料的详细结构,但这种反应经常以惊人的高 Z 选择性发生。