Towards New Tricyclic Motifs: Intramolecular C-H Arylation as the Key Step in a Formal [3+3] Cyclocondensation Strategy
作者:Johannes L. Vrijdag、Dries De Ruysscher、Wim M. De Borggraeve
DOI:10.1002/ejoc.201700020
日期:2017.3.17
A general, convergent [3+3] cyclocondensation approach giving access to four isomeric [1,3]oxazolo[4,5‐c]‐1‐naphthyridin‐4(5H)‐ones was established. The key synthetic steps in this approach are: (1) the construction of a challenging amide linker connecting the two peripheral heterocycles; and (2) a palladium‐catalysedintramolecular C–H arylation to form the key heterocycle.
建立了一种通用的收敛性[3 + 3]环缩合方法,该方法可使用四个异构体[1,3]恶唑并[4,5 - c ] -1-萘啶-4(5 H)-。这种方法的关键合成步骤是:(1)连接两个外围杂环的具有挑战性的酰胺连接基的构建;(2)钯催化的分子内C–H芳基化反应形成关键的杂环。
Nouveaux dérivés de 5,10-dihydrodipyrido (2,3-b:2,3-e) pyrazine et 5,10-dihydrodipyrido (2,3-b:3,2-e) pyrazine, leur procédé de préparation et les compositions pharmaceutiques qui les contiennent
申请人:ADIR ET COMPAGNIE
公开号:EP0963986A2
公开(公告)日:1999-12-15
Composé de formule (I) :
dans laquelle :
X représente N, C ou CH,
Y représente N quand X représente C ou CH, ou Y représente C ou CH quand X représente N,
R1 représente un groupement alkyle éventuellement substitué,
R2 et R3, identiques ou différents, représentent un groupement Z ou W, tel que défini dans la description.
Médicaments.
式 (I) 的化合物
其中:
X 代表 N、C 或 CH、
当 X 代表 C 或 CH 时,Y 代表 N;或当 X 代表 N 时,Y 代表 C 或 CH、
R1 代表任选取代的烷基、
R2 和 R3(可以相同或不同)代表 Z 或 W 基团,如描述中所定义。
药物。
Hetarynic synthesis and chemical transformation of dihydrodipyridopyrazines
Unprecedented dihydrodipyridopyrazines were easily obtained by hetarynic dimerization of 2-alkylamino-3-halogenopyridines in the presence of the complex base NaNH2-tBuONa. Derivatizations of the new heterocycles are described. The anticancer activity of these compounds is also mentioned. (C) 2002 Elsevier Science Ltd. All rights reserved.
Design of new anticancer drugs. I. Easy hetarynic access to dihydrodipyridopyrazines, a new family of antitumor agents
Unprecedented dihydrodipyridopyrazines were easily obtained by hetarynic dimerization of 2-alkylamino-3-bromopyridines in the presence of the complex base NaNH2-tBuONa. A few chemical properties of these new heterocycles are reported, as well as their antitumoral activity. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.