Efficient Synthesis of 4- and 5-Substituted 2-Aminopyrimidines by Coupling of β-Chlorovinyl Aldehydes and Guanidines
作者:Anna S. Komendantova、Alexander V. Komkov、Yulia A. Volkova、Igor V. Zavarzin
DOI:10.1002/ejoc.201700737
日期:2017.8.10
A general, practical and simple synthesis of functionalized 2-aminopyrimidines starting from β-chlorovinyl aldehydes and amidines is reported. In the presence of potassium carbonate, various ketones have been efficiently incorporated into the pyrimidine derivatives by two-step sequence involving the Vilsmeier-Haack reaction followed by the condensation with guanidines. The protocol is distinguished
A One-Pot Synthesis of 2-Aminopyrimidines from Ketones, Arylacetylenes, and Guanidine
作者:Elena Yu. Schmidt、Inna V. Tatarinova、Nadezhda I. Protsuk、Igor’ A. Ushakov、Boris A. Trofimov
DOI:10.1021/acs.joc.6b02233
日期:2017.1.6
The three-component reaction of ketones, arylacetylenes, and guanidine catalyzed by the KOBut/DMSO system leads to 2-aminopyrimidines in up to 80% yield. Depending on structure of the starting ketones, the aromatization of intermediate dihydropyrimidines occurs either with loss of hydrogen molecules or methylbenzenes. The latter process takes place in the ketones, in which one of the substituents is
KOBu t / DMSO系统催化的酮,芳基乙炔和胍的三组分反应可产生高达80%收率的2-氨基嘧啶。取决于起始酮的结构,中间体二氢嘧啶的芳构化在氢分子或甲基苯损失的情况下发生。后一种方法发生在酮中,其中一个取代基不是甲基。对于二烷基-,芳基(杂芳基)烷基-和环烷基酮而言,反应条件是容许的。
NOVEL HETEROCYCLE COMPOUNDS AND USES THEREOF
申请人:Li Peng
公开号:US20100184778A1
公开(公告)日:2010-07-22
The invention relates to chemical compounds, or pharmaceutically acceptable salts thereof of the formula (Q) or (I), which penetrate the blood-brain barrier, inhibit the formation and accumulation of beta-amyloid, and are useful in the treatment of neurodegenerative diseases, particularly Alzheimer's disease. Further, the compounds of the present invention inhibit certain kinases, thereby being useful for the treatment of cancers of the central nervous system.
2-Aminopyrimidines in just two steps from ketones, acetylenes and guanidine via β,γ enones
作者:Elena Yu. Schmidt、Inna V. Tatarinova、Elena V. Ivanova、Boris A. Trofimov
DOI:10.1016/j.mencom.2017.05.022
日期:2017.5
Available beta,gamma-enones, the products of nucleophilic addition of ketones to phenylacetylene, react with guanidine in the KOH/DMSO system at 70 degrees C to give 2-aminopyrimidines in up to 72% yield.