New synthesis of conjugated ketones from 2-phenylthio-allyl and -allenyl alcohols
Abstract
2-Phenylthioallyl alcohols (I) rearrange in acid to α-phenylthioethyl ketones (II) which, on oxidation and elimination, yield vinyl ketones; through a similar reaction sequence 2-phenylthioallenyl alcohols (IX) give the 2,4-dienones (XII).