1987
DOI: 10.1002/chin.198701074
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R. L. N. HARRIS,
H. G. MCFADDEN

Abstract: Abstract 074ChemInform Abstract A reinvestigation of the cyclization of the pyrrole (Ia) in PPA showsthat rearrangement of the sulfur substituent from position 2 to position 3 precedes cyclization to yield the thieno(3,2)pyrrole (IIIa) rather than the thieno(2,3)pyrrole (IIa) previously proposed. The structureof (IIIa) is confirmed by an independent synthesis starting from the aldehyde (IV) as shown in the scheme (in part no yields given) and by the preparation of the N-methyl derivative (IIIb)from the reacti…

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