Process for preparing Benzoxepino- or Benzthiapino[4,3-b]pyrrole-2-acetic acids
Improved yields of Benzoxepino- or Benzthiapino[4,3-b]pyrrole-2-acetic acids have been achieved from processes based on modifications performed on a pyrrole carboxylic ester rather than on a pyrrole-α-oxoacetate.
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(2008/06/13)
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