α‐Methylierter Fencholen‐ und α‐Campholenaldehyd – Synthese und Reaktionen

α-Methylated Fencholenic and α-Campholenic Aldehyde – Synthesis and Reactions The syntheses of α-methylated fencholenic (6a) and α-campholenic aldehyde (6b) via the corresponding azomethines (5) are reported. Aldol condensations of 6a, b with following reductions give the allylic alcohols (12–16) and hydrogenation the saturated alcohols (17–21) with strong woody odors, some of the allylic alcohols resembling that of sandal wood. Simple reduction or oxidation of 6a, b give the alcohols (24, 27), ethers (26), esters (23, 25, 28) and ketones (29) which have interesting woody odors with spicy, earthy and herbaceous notes.