Tetrahedron Letters p. 6547 - 6550 (1995)
Update date:2022-09-26
Topics:
Fulloon
El-Nabi
Kollenz
Wentrup
Thermal CO extrusion from 2,3-dihydropyrrole-2,3-dione 3 generates imidoylketene 4, which cyclizes to 2-methoxy-4-quinolone (6). Using flash vacuum pyrolysis and low temperature IR spectroscopy, it is shown that 4 interconverts with ketenimine 5 prior to cyclization to 6.
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