A new access to efaroxan and its 5-amino derivatives
摘要:
The formal total synthesis of racemic efaroxan, a 2-disubstituted 2,3-dihydrobenzofuran having interesting therapeutic properties, and the preparation of some 5-amino derivatives were achieved using a convergent approach. The key intermediates of both syntheses were obtained after a [3+2] cycloaddition reaction between two easily accessible partners. (c) 2007 Elsevier Ltd. All rights reserved.
Synthesis of 5-substituted 2,3-dihydrobenzofurans in a one-pot oxidation/cyclization reaction
摘要:
Variously substituted 2,3-dihydrobenzofurans have been synthesized according :o a sequential one-pot oxidation/cyclization procedure between para-aminophenol derivatives and an azadiene. (C) 2011 Elsevier Ltd. All rights reserved.