Vinylation of α-Aminoazoles with Triethylamine: A General Strategy to Construct Azolo[1,5-<i>a</i>]pyrimidines with a Nonsubstituted Ethylidene Fragment
作者:Qinghe Gao、Zhenhua Sun、Qinfei Xia、Ruonan Li、Wenlong Wang、Siwei Ma、Yixin Chai、Manman Wu、Wei Hu、Péter Ábrányi-Balogh、György M. Keserű、Xinya Han
DOI:10.1021/acs.orglett.1c00571
日期:2021.4.2
A new general synthesis of pharmaceutically important azolo[1,5-a]pyrimidines starting from widely available 3(5)-aminoazoles, aldehydes, and triethylamine is developed. The key is to enable the vinylation reaction that allows the in situ generation of elusive acyclic enamines and the subsequent annulation reaction to occur. This direct and practical strategy is capable of constructing a range of 5
从广泛可用的3(5)-氨基唑,醛和三乙胺开始,开发了一种重要的药学上重要的偶氮[1,5- a ]嘧啶的新的一般合成方法。关键是要实现乙烯基化反应,该反应可以原位产生难以捉摸的无环烯胺,并随后发生环化反应。这种直接而实用的策略能够构建一系列5,6-未取代的吡唑并[1,5- a ]嘧啶和[1,2,4]三唑并[1,5- a ]嘧啶。更重要的是,该方案为制备临床使用的扎来普隆提供了一种简明的合成途径。
B-Raf kinase plays a critical role in the Raf-MEK-ERK signaling pathway and inhibitors of B-Raf could be used in the treatment of melanomas, colorectal cancer, and other Ras related human cancers. We have identified novel small molecule pyrazolo[1,5-a]pyrimidine derivatives as B-Raf kinase inhibitors. Structure-activity relationship was generated for various regions of the scaffold to improve the biochemical pro. le. (C) 2009 Elsevier Ltd. All rights reserved.
PYRAZOLO[1,5-A]PYRIMIDINE DERIVATIVES AND METHODS OF USE THEREOF
申请人:Wyeth
公开号:EP1996594A2
公开(公告)日:2008-12-03
[EN] PYRAZOLO[1,5-A]PYRIMIDINE DERIVATIVES AND METHODS OF USE THEREOF<br/>[FR] DERIVES DE PYRAZOLO[1,5-A]PYRIMIDINE ET PROCEDES D'UTILISATION DE CEUX-CI
申请人:WYETH CORP
公开号:WO2007109093A2
公开(公告)日:2007-09-27
[EN] The present invention relates to pyrazolo[1,5-a]pyrimidine derivatives, compositions comprising an effective amount of a pyrazolo[1,5-a]pyrimidine derivative and methods for treating or preventing cancer, comprising administering to a subject in need thereof an effective amount of a pyrazolo[1,5-a]pyrimidine derivative. [FR] La présente invention concerne des dérivés de pyrazolo[1,5-a]pyrimidine, des compositions comprenant une quantité efficace d'un dérivé de pyrazolo[1,5-a]pyrimidine et des procédés pour le traitement ou la prévention du cancer, consistant à administrer une quantité efficace de dérivé de pyrazolo[1,5-a]pyrimidine à un sujet en ayant besoin.