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.
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Ohloff et al. (1976) studied this question.
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