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
据报道,从β-氯乙烯基醛和am开始的官能化的2-氨基嘧啶的一般,实用和简单的合成。在碳酸钾的存在下,通过涉及维斯迈尔-哈克(Vilsmeier-Haack)反应,然后与胍缩合的两步顺序,各种酮已被有效地掺入嘧啶衍生物中。该协议的特点是操作简便,试剂价格低廉和官能团耐受性强。在许多情况下,无需使用柱色谱法即可以高至极好的收率获得纯净的固体产品。该方法的合成价值通过甾族嘧啶和抗肿瘤药Imatinib和Mocetinostat的前体的有效合成得到证明。