Cellulose sulfonic acid as a green, efficient, and reusable catalyst for Nazarov cyclization of unactivated dienones and pyrazoline synthesis
作者:Zahra Daneshfar、Ali Rostami
DOI:10.1039/c5ra19773b
日期:——
has been developed. Cellulose sulfonic acid (CSA) not only was able to induce the cyclization of “unactivated” dienones generating cyclopentenoids; it was also able to trigger the cyclization of α,β-unsaturated hydrazones giving rise to pyrazolines in excellent yields under green reaction conditions. The ease of catalyst recovery and reusability, short reaction time, simple experimental and work-up procedure;