Tetrahedron Letters p. 6063 - 6066 (1994)
Update date:2022-08-04
Topics:
Adam, Waldemar
Arhweiler, Michael
Reinhardt, Dirk
Sauter, Markus
The triphenylphosphine deoxygenation of 2,3-dimethylbenzofuran, 2,3-dimethylindole- and 2,3-dimethylindene dioxetanes 2 leads to the respective epoxides 4 through the intermediary phospholanes 3, of which the indene and indole derivatives 3d, e were detected by low-temperature NMR spectroscopy; with excess PH3P the benzofuran dioxetane 2a affords the benzofuran 1a, a novel process in which the resulting benzofuran epoxide 4a is in situ deoxygenated.
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