Neue Ambra‐Riechstoffe durch photochemische Reaktionen von 15, 16‐Dinorlabd‐8(20)‐en‐13‐on. Photochemische Reaktionen. 84. Mitteilung

New Ambra Odorants by Photoreactions of 15, 16-Dinorlabd-8(20)-en-13-one. UV.-irradiation of 15,16-dinorlabd-8(20)-en-13-one (1) led to the fragmentation product 4 and its photo-cyclisation product 5. Ethers 6 and 7 and the βγ-unsaturated alcohols 8 and 10 were formed via ketone 9, a double bond isomer of 1. The olfactory properties of the photo-products are described.