中枢腺苷 A 1受体 (A 1 R) 与疼痛、睡眠、物质使用障碍和神经退行性疾病有关,是药物开发的重要目标。用于 A 1 R 正电子发射断层扫描 (PET) 的放射性示踪剂将能够测量睡眠-觉醒周期中内源性腺苷和 A 1 R的动态相互作用。尽管已经开发了几种人类 A 1 R PET 示踪剂,但大多数是基于黄嘌呤的拮抗剂,无法证明与内源性腺苷的竞争性结合。在此,我们探索了用于开发激动剂 A 1 的非核苷(3,5-二氰基吡啶和 5-氰基嘧啶)模板R PET 放射性示踪剂。我们合成了新的类似物,包括 2-amino-4-(3-methoxyphenyl)-6-(2-(6-methylpyridin-2-yl)ethyl)pyridine-3,5-dicarbonitrile (MMPD, 22b ),部分 A 1 R 亚纳摩尔亲和力的激动剂。[ 11 C] 22b显示出合适的血脑屏障 (BBB)
One-pot Four-component Synthesis of Highly Functionalized Pyridines Using Nitroketene Dithioacetal as a Source of Methyl Thiolate Under Solvent-free Condition
作者:Mohammad Bayat、Mehrnoosh Saboni、Behrouz Notash
DOI:10.1002/jhet.3051
日期:2018.1
A simple method for the synthesis of highly functionalized 2‐amino‐6‐(methylthio)pyridine‐3,5‐dicarbonitriles is presented. In this method, pyridine derivatives are synthesized from the reaction of malononitrile, aromatic aldehydes, nitroketene dithioacetal in the presence of ethylenediamine. The notable features of this method are the simple Experimental procedure, short reaction time, and good yields