From: Maringanti Krishnamacharyulu (maringanti9$##$yahoo.com)
Date: Fri Feb 07 2003 - 04:22:01 EST
For such cyclizations, trifluoroacetic anhydride is a good reagent. For more information, Check, Basavaish et.al. Chem commun, 1999..I am not sure of page numbers
Krishna
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