A green, efficient and mild one-potsynthesis of pyrano[3,2-b]pyran derivatives via a three component reaction in the ionicliquid [bmim]BF4 is reported. This method has the advantages of environmental friendliness, operational simplicity, high yields and reuse of the ionicliquid.
One‐pot synthesis of 2‐amino‐4,8‐dihydropyrano[3,2‐b]pyranes and pyridopyrimidines under mild conditions
作者:Fatemeh Rigi、Hamid Reza Shaterian
DOI:10.1002/jccs.201800048
日期:2019.4
was applied for the one‐pot, three‐component synthesis of 2‐amino‐4,8‐dihydropyrano[3,2‐b]pyrane‐3‐carbonitriles and pyridopyrimidines, under solvent‐free conditions. The reaction was carried out at room temperature, and pure products were obtained in high yields and short reaction times (3–7 min). This work introduced an environmentally benign procedure for the synthesis of these classes of biological
Acetic Acid-Mediated Synthesis of Kojic Acid Derivatives
作者:Y. B. Kiran、G. Rambabu、V. Vijayakumar、L. C. A. Barbosa
DOI:10.1134/s1070428021070162
日期:2021.7
acetic acid-mediated synthesis of kojicacidderivatives through a multicomponent reaction (MCR) has been developed. This new protocol is simple and efficient; it involves a one-pot reaction of equimolar amounts of kojicacid, aromatic aldehydes, and several active methylene compounds at 90°C in 3 h and results in the formation of a wide range of kojicacidderivatives with high yields. Furthermore, the
MCM-41-SO 3 H, ordered mesoporous silica material MCM-41 with covalently anchored sulfonic acid groups, was used as a solid acid catalyst for the convenient, efficient, and ‘green’ synthesis of 2-amino-6-(hydroxymethyl)-8-oxo-4-aryl-4,8-dihydropyrano[3,2- b ]pyrans via a one-pot, three-component reaction of 5-hydroxy-2-(hydroxymethyl)-4 H -pyran-4-one, aldehydes and malononitrile in aqueous media.