1,3-(4,4′-bipyridinium disulfonic acid) propane-dihydrogen sulfate as highly effectual bi-functional catalysts for the rapid preparing chromeno[4,3-b]chromenes and pyrido[2,3-d:6,5-d′]dipyrimidines

期刊论文
发表日期：

2024年1月5日

查看全文

Abdelgadir Altoum,
Ebraheem Abdu Musad Saleh,
Anaheed Hussein Kareem,
Sana Shahab,
Maha Medha Deorari,
Dmitry Olgovich Bokov,
Usama S. Altimari,
Murtadha Laftah Shaghnab,
Ahmed Alawadi,
Ali Alsalamy

摘要

In this research, a novel Brønsted-acidic ionic liquid 1,3-(4,4′-bipyridinium disulfonic acid)-propane-dihydrogen sulfate (BPDSPDH) was synthesized as a bi-functional catalyst. BPDSPDH was characterized using various analytical techniques such as FTIR, TGA, ¹³CNMR, ¹HNMR, and mass spectrometry. Afterward, the catalytic ability of BPDSPDH was explored in the synthesis of chromeno[4,3-b]chromene and pyrido[2,3-d:6,5-d′]dipyrimidine derivatives. BPDSPDH is an ionic liquid catalyst with advantages such as having a high catalytic activity due to its acidic and basic sites, the use of affordable and easily accessible starting materials for catalyst production, recyclability of the catalyst up to 4 times without significant loss in catalytic activity, short reaction time, high yields and moderate reaction conditions.

Graphical abstract