synthesis of prenylatedflavonoids, (±)-abyssinone-VI-4-O-methyl ether 1, (±)-abyssinone-IV-4′-O-methyl ether 2, (±)-abyssinone-V-4′-O-methyl ether 3 and (±)-sigmoidinE 4 has been described. The key intermediate 4-hydroxy-3,5-di-(3-methylbut-2-enyl)benzaldehyde 6 was also first synthesized that features regioselective prenylation of 4-hydroxybenzaldehyde and crystallizing with petroleum ether from the reaction