Armin Mandana, Jafari Abbas Ali, Arjmandzadeh Beheshteh
Department of Chemistry, Yazd University, Yazd, Iran.
BMC Chem. 2024 Sep 28;18(1):188. doi: 10.1186/s13065-024-01269-1.
Humin-sulfuric acid (Humin-SOH) as a novel efficient biobased sulfonic acid was easily prepared by adding chlorosulfuric acid (ClSOH) to Humin and characterized by potentiometric titration and FT-IR spectrum. Humin-SOH is an eco-friendly, heterogeneous biobased, and efficient catalyst for Paal-Knorr and Clauson-Kaas pyrrole synthesis. The catalyst is easily recovered by simple filtration and has excellent turnover efficiency even after 4 cycles. Besides, due to the clearance of the biocatalyst away from the reaction media, the desired highly pure products can be achieved in high to excellent yields. Due to high water dispersibility, Humin-SOH can be utilized as a highly efficient green catalyst for pyrrole synthesis.
通过向胡敏素中加入氯磺酸（ClSOH），可轻松制备新型高效生物基磺酸胡敏素 - 硫酸（Humin - SOH），并通过电位滴定和傅里叶变换红外光谱对其进行表征。Humin - SOH是一种用于帕尔 - 克诺尔和克劳森 - 卡斯吡咯合成的环保型、多相生物基高效催化剂。该催化剂通过简单过滤即可轻松回收，即使经过4个循环仍具有出色的周转效率。此外，由于生物催化剂与反应介质分离，能够以高至优异的产率获得所需的高纯度产物。由于具有高水分散性，Humin - SOH可作为吡咯合成的高效绿色催化剂。
