
Helvetica Chimica Acta p. 27 - 46 (1991)
Update date:2022-08-03
Topics:
Obrecht, Daniel
The substituted 2,2-dialkyl-2,3-dihydro-4H-pyran-4-ones of type II and III have been prepared by acid-catalyzed cyclization of the corresponding substituted acetylenic ketones I in good to excellent yields (Scheme 1).These 2,2-dialkyl-2,3-dihydro-4H-pyran
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