Sulfated titania catalyzed water mediated efficient synthesis of dicoumarols—a green approach
摘要:
An efficient, mild, and environmental friendly method has been developed for the synthesis of dicoumarols in water over Lewis and Bronsted acid catalyst sulfated titania (TiO2/SO42-). The method involves the condensation of various aromatic and aliphatic aldehydes with 4-hydroxycoumarin. It affords the corresponding product in high yield with short reaction times employing a very low loading of catalyst. The catalyst was reused several times without significant change in activity. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
Bis-(Coumarin) Compounds With Anti-Inflammatory Activity
申请人:Mercep Mladen
公开号:US20080153872A1
公开(公告)日:2008-06-26
Certain bis-(coumarin) compounds as well as the products of their intramolecular cyclization including pharmaceutically acceptable salts, hydrates, solvates, clathrates, prodrugs, tautomers and stereoisomers thereof are disclosed. Certain processes and intermediates for the preparation of certain bis-(coumarin) compounds, as well as for the use of these compounds as therapeutically active agents in the prophylaxis and treatment of asthma and other inflammatory diseases and conditions in mammals, especially humans are also disclosed.
Sulfated titania catalyzed water mediated efficient synthesis of dicoumarols—a green approach
作者:Bikash Karmakar、Anupam Nayak、Julie Banerji
DOI:10.1016/j.tetlet.2012.06.024
日期:2012.8
An efficient, mild, and environmental friendly method has been developed for the synthesis of dicoumarols in water over Lewis and Bronsted acid catalyst sulfated titania (TiO2/SO42-). The method involves the condensation of various aromatic and aliphatic aldehydes with 4-hydroxycoumarin. It affords the corresponding product in high yield with short reaction times employing a very low loading of catalyst. The catalyst was reused several times without significant change in activity. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.