この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。p-Coumar-, coniferyl- and sinap aldehydes were synthesized in good yields by new two synthetic methods. 1) The aldehydes were prepared by a two-carbon homologation of p-hydroxybenzaldehyde, vanillin and syringaldehyde with 2, 4, 4, 6-tetramethyl-5, 6-dihydro-1, 3-oxazine in the presence of n-butyllithium in anhydrous tetrahydrofurane at -77℃. 2) The aldehydes were also prepared by reduction of the corresponding p-hydroxycinnamic acid chlorides with lithium tri-t-butoxyaluminohydride in anhydrous diglyme at -77℃