Attack on fluorinated 2-aryloxazolines by organolithiums: dearomatisation, lithiation or substitution
摘要:
Treatment of 4-, 3- or 2-aryl-4,5-diphenyloxazolines with isopropyllithium gives the products of dearomatising addition, fluorine-directed lithiation or nucleophilic aromatic substitution of fluoride depending on substitution pattern and conditions. In the case of the 4-fluoroaryl substrates, fluorinated 1,4-cyclohexadiene may be obtained in good yield. (C) 2011 Elsevier Ltd. All rights reserved.
A one-pot procedure for the synthesis of oxazolines was developed. An amino alcohol was coupled with benzoyl chlorides in the presence of triethylamine to produce a β-hydroxyamide. Direct treatment with methanesulfonyl chloride forms oxazolines in good yields.
Stereoselective Dearomatizing Addition of Nucleophiles to Uncomplexed Benzene Rings: A Route to Carbocyclic Sugar Analogues
作者:Jonathan Clayden、Sean Parris、Nuria Cabedo、Andrew H. Payne
DOI:10.1002/anie.200801078
日期:2008.6.23
Attack on fluorinated 2-aryloxazolines by organolithiums: dearomatisation, lithiation or substitution
作者:James Clayton、Jonathan Clayden
DOI:10.1016/j.tetlet.2011.02.091
日期:2011.5
Treatment of 4-, 3- or 2-aryl-4,5-diphenyloxazolines with isopropyllithium gives the products of dearomatising addition, fluorine-directed lithiation or nucleophilic aromatic substitution of fluoride depending on substitution pattern and conditions. In the case of the 4-fluoroaryl substrates, fluorinated 1,4-cyclohexadiene may be obtained in good yield. (C) 2011 Elsevier Ltd. All rights reserved.