角噻唑并[5,4- f ]和[4,5- h ]喹唑啉的新型合成,其线性噻唑并[4,5- g ]和[5,4- g ]喹唑啉类似物的制备
摘要:
9-氧代8,9-二氢噻唑[5,4- f ]喹唑啉-2-腈(1)或6-氧代6,7-二氢噻唑[4,5 - h ]喹唑啉-2-腈(2)的合成)进行了重新研究,目的是改变与喹唑啉4-one部分相连的噻唑环的位置,以便合成两个新颖的线性三环式8-氧代-7,8-二氢噻唑并[4,5- g ]喹唑啉- 2-甲腈(3)和8-氧代7,8-二氢噻唑并[5,4 - g ]喹唑啉-2-甲腈(4)。本文描述的途径为获得有效的生物活性杂环化合物文库提供了各种替代和转化途径。
thiazolo[5,4-f]quinazolin-9(8H)-one has been developed through sequential activation of C–H bonds to furnish diarylated compounds. This strategy allows the regioselective C2 and C7 arylation by a judicious choice of coupling partners and bases, requiring no additional ligands or directing groups. Differently substituted N8-benzylated-2,7-diaryl-thiazoloquinazolin-9(8H)-ones were thereby obtained in a
噻唑并[5,4 - f ]喹唑啉-9(8 H)-one的选择性功能化是通过顺序激活CH键以提供二芳基化化合物而开发的。该策略允许通过明智地选择偶联配偶体和碱基来进行区域选择性的C2和C7芳基化,不需要其他配体或指导基团。从而以容易的方式获得了不同取代的N 8-苄基化的2,7-二芳基-噻唑并喹唑啉-9(8 H)-。还执行一锅法。这些协议为药物发现所需的这种极有价值的支架的后期功能化提供了合成有用的途径。
Thiazolo[5,4-f]quinazolin-9-ones, inhibitors of glycogen synthase kinase-3
In an effort to identify new protein kinase inhibitors with increased potency and selectivity, we have developed the microwave-assisted synthesis of thiazolo[5,4-f]quinazolin-9-ones. The effects of eighteen derivatives on CDK1/cyclin B, CDK5/p25, and GSK-3 were investigated. Several turned out to inhibit GSK-3 in the micromolar range. Molecular modeling studies suggest that the most selective GSK-3 inhibitors 7a-d bind into the ATP-binding site through a key hydrogen bond interaction with Val135 and target the specific hydrophobic backpocket of the enzyme. (c) 2006 Elsevier Ltd. All rights reserved.
Efficient synthesis of thiazoloquinazolinone derivatives
An original route to the rare 8H-thiazolo[5,4-f]quinazolin-9-one 1 and the novel 7H-thiazolo[4,5-h]quinazolin-6-one 2 is described. Access to the regioisomers was realized by fusion of a thiazole and a quinazoline ring via Appel's salt chemistry. Thermal reactions were carried Out using a focused microwave reactor. reducing the overall time of the multi-step synthesis. (C) 2003 Elsevier Science Ltd. All rights reserved.