One-pot synthesis of benzopyrans catalyzed by silica supported dual acidic ionic liquid under solvent-free conditions

Heterocyclic communications

article

Qiang Zhang¹  Huaixin Wei¹  Jihang Li¹  Xin Zhao¹  Jun Luo² 

[1] School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology;School of Chemical Engineering, Nanjing University of Science and Technology

关键词: benzopyrans;    one-pot;    solvent-free;    supported ionic liquid;   

DOI  :  10.1515/hc-2017-0163

学科分类：内科医学

来源: De Gruyter

【 摘 要 】

A mild and efficient method was developed for the preparation of tetrahydrobenzo[ b ]pyrans through a one-pot three-component condensation of aldehydes, malononitrile and dimedone in the presence of silica supported dual acidic ionic liquid (DAIL@SiO 2 ) as a powerful catalyst under solvent-free conditions. This procedure is characterized by mild reaction conditions, simple workup and environmental friendliness. Moreover, the catalyst could be recycled for five times with only a slight loss of catalytic activity.

【 授权许可】

CC BY|CC BY-NC-ND