1-Hetero-2,4-cyclopentadienes can be prepared by condensation of an a-dicarbonyl

Chapter 25, Problem 38

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1-Hetero-2,4-cyclopentadienes can be prepared by condensation of an a-dicarbonyl compound andcertain heteroatom-containing diesters. Propose a mechanism for the following pyrrole synthesis.B BC6H5CCC6H5 CH3OCCH2NCH2COCH3OOB BO ONaOCH3, CH3OH, CH3OOC COOCH3H5C6 C6H5NH3CCOAAPH AHow would you use a similar approach to synthesize 2,5-thiophenedicarboxylic acid?

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