Synthesis 2008(8): 1324-1324  
DOI: 10.1055/s-2008-1066998
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© Georg Thieme Verlag Stuttgart · New York

Amino-Claisen versus Oxy-Claisen Rearrangement: Regioselective Synthesis of Pyrrolocoumarin Derivatives



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Publication Date:
10 April 2008 (online)

Majumdar KrishnaC.. Chattopadhyay Buddhadeb. Synthesis  2008,  921 

Reaction arrows were incorrectly placed within Scheme 3. Furthermore, the cyclization of intermediate 6 to give the product pyrrolocoumarin derivatives 4 was described as a 5-exo-trig process, both in Scheme 3 and the accompanying text, but should be referred to as a 5-exo-dig cyclization. The corrected Scheme 3 is given here.

Scheme 3 Probable mechanism of the amino-Claisen rearrangement

      Scheme 3 Probable mechanism of the amino-Claisen rearrangement