Exploring the scope of the Gewald reaction: Expansion to a four-component process
作者:M. Saeed Abaee、Atefeh Hadizadeh、Mohammad M. Mojtahedi、Mohammad R. Halvagar
DOI:10.1016/j.tetlet.2017.02.071
日期:2017.4
An efficient four-component reaction was developed to take advantage of the reactivity of the 2-aminothiophene-3-carbonitrile functionality, which is obtained during the classical three-component Gewald reaction. Various α-methylene bearing ketones were reacted with malononitrile, elementalsulfur, and aryl/heteroarylnitrile derivatives in t-BuOH/NaOH to afford 2-arylthieno[2,3-d]pyrimidin-4-amines
开发了一种有效的四组分反应,以利用2-氨基噻吩-3-甲腈官能团的反应性,这是在经典的三组分Gewald反应过程中获得的。使各种带有α-亚甲基的酮与丙二腈,元素硫和芳基/杂芳基腈衍生物在t- BuOH / NaOH中反应,以高收率提供2-芳基噻吩并[2,3 - d ]嘧啶-4-胺。初步研究表明,该产品的光物理性质及其用作金属传感器的潜力。
Microwave-Assisted Synthesis of 4-Amino-2-arylthieno[2,3-d]pyrimidines and Their Subsequent Functionalization
New 4-amino-2-arylthieno[2,3-d]pyrimidines were synthesized by reacting 2-amino-3-cyanothiophenes and aryl nitriles under microwave irradiation. Functionalization of 4-amino group was made by acetic anhydride and several isocyanates. 2-amino-3-cyanothiophenes - 4-amino-2-arylthieno[2,3-d]pyrimidines- microwave irradiation
通过在微波辐射下使2-氨基-3-氰基噻吩与芳基腈反应,合成了新的4-氨基-2-芳基噻吩并[2,3- d ]嘧啶。用乙酸酐和几种异氰酸酯对4-氨基进行官能化。 2-氨基-3-氰基噻吩-4-氨基-2-芳基噻吩并[2,3- d ]嘧啶-微波辐射