Solvent-free, highly efficient one-pot multi-component synthesis of 1-amido- and 1-carbamato-alkyl naphthols/phenols catalyzed by ethylammonium nitrate as reusable ionic liquid under neat reaction condition at ambient temperature
作者:Shafeek A.R. Mulla、Tarek A. Salama、Mohsinkhan Y. Pathan、Suleman M. Inamdar、Santosh S. Chavan
DOI:10.1016/j.tetlet.2012.12.004
日期:2013.2
developed for the efficient synthesis of 1-amido- and 1-carbamato-alkyl naphthols/phenols in excellent yields via one-pot three-component condensation of various aldehydes, amides/carbamates/urea, and naphthols/phenols using ethylammonium nitrate (EAN) as a reusable ionic liquid catalyst under neat reaction condition at ambient temperature.
Synthesis of highly functionalized oxazines by Vilsmeier cyclization of amidoalkyl naphthols
作者:M. Damodiran、N. Panneer Selvam、Paramasivan T. Perumal
DOI:10.1016/j.tetlet.2009.07.051
日期:2009.9
The intramolecular cyclization of amidoalkyl naphthols by Vilsmeierreagent produced 1,3-oxazines. The Vilsmeierreagent (chloromethylenedimethylammonium chloride) has been used as an efficient and cheap acid activator for the one-stepsynthesis of oxazine derivatives. A mechanism involving sequential haloformylation and intramolecular nucleophilic cyclization is proposed.