Limitations in the application of anionic oxy-cope sigmatropy to elaboration of the forskolin nucleus
作者:Leo A. Paquette、Jeffrey A. Oplinger
DOI:10.1016/0040-4020(89)80038-9
日期:1989.1
conditions to the thermodynanlic enolate 19. This intermediate has been Crapped with several electrophiles, the most relevant to elaboration of the forskolln nucleus being phenylselenenyl chloride. A route Co tricyclic ketones 25 and 26 Is thereby opened. In an attempt to expand upon this chemistry, several more highly functionallzed 3,4-dlhydro-2H-pyrans were prepared; some were obtained in enantiomerlcally