1,3-dipropyl-8-(2-furanyl)xanthine 在
镍氢气 作用下,
以
甲醇 为溶剂,
100.0 ℃
、183.84 MPa
条件下,
以to yield 0.34 g of the 1,3-dipropyl-8-(2-tetrahydrofuranyl)xanthine as a white solid, mp 155°-8° C.的产率得到1,3-dipropyl-8-(2-tetrahydrofuranyl) xanthine
参考文献:
名称:
Derivatives of xanthine, pharmaceutical compositions and methods of use
8-Polycycloalkyl-1,3-dipropylxanthines as potent and selective antagonists for A1-adenosine receptors
摘要:
With the aim of characterizing the hydrophobic interactions between xanthines and the A1 receptor site, 1,3-dipropyl-8-substituted xanthines were synthesized. Introduction of a quaternary carbon and the conformationally restricted cyclopentyl moiety into the 8-position of xanthines enhanced the adenosine A1 antagonism. 1,3-Dipropyl-8-(3-noradamantyl)xanthine (42) was identified to be a selective and the most potent A1 receptor antagonist reported to date. Under our structure-activity relationship, the 8-substituent of xanthine antagonists and the N6-substituent of adenosine agonists appears to bind to the same region of the A1 receptor.
Neue Xanthinderivate mit Adenosin-antagonistischer Wirkung
申请人:BOEHRINGER INGELHEIM KG
公开号:EP0374808A2
公开(公告)日:1990-06-27
Die Erfindung betrifft neue Xanthinderivate der allgemeinen Formel I, Verfahren zu ihrer Herstellung sowie ihre Verwendung als Arzneimittel.
本发明涉及通式 I 的新黄嘌呤衍生物、其制备工艺及其作为药物的用途。
Sulfur-containing 1,3-dialkylxanthine derivatives as selective antagonists at A1-adenosine receptors
作者:Kenneth A. Jacobson、Leonidas Kiriasis、Suzanne Barone、Barton J. Bradbury、Udai Kammula、Jean Michel Campagne、John W. Daly、John L. Neumeyer、Wolfgang Pfleiderer、Sherrie Secunda
DOI:10.1021/jm00128a031
日期:1989.8
Sulfur-containing analogues of 8-substituted xanthines were prepared in an effort to increase selectivity or potency as antagonists at adenosine receptors. Either cyclopentyl or various aryl substituents were utilized at the 8-position, because of the association of these groups with high potency at A1-adenosine receptors. Sulfur was incorporated on the purine ring at positions 2 and/or 6, in the 8-position substituent in the form of 2- or 3-thienyl groups, or via thienyl groups separated from an 8-aryl substituent through an amide-containing chain. The feasibility of using the thienyl group as a prosthetic group for selective iodination via its Hg2+ derivative was explored. Receptor selectivity was determined in binding assays using membrane homogenates from rat cortex [( 3H]-N6-(phenylisopropyl)adenosine as radioligand] or striatum [3H]-5'-(N-ethylcarbamoyl)adenosine as radioligand] for A1- and A2-adenosine receptors, respectively. Generally, 2-thio-8-cycloalkylxanthines were at least as A1 selective as the corresponding oxygen analogue. 2-Thio-8-aryl derivatives tended to be more potent at A2 receptors than the oxygen analogue. 8-[4-[(Carboxy-methyl)oxyl] phenyl]-1,3-dipropyl-2-thioxanthine ethyl ester was greater than 740-fold A1 selective.