Bicyclo (4,3,0)-nonenol perfume components - prepd by photo-cyclising irradiation of dihydro-beta-ionone type aldehydes and ketones

摘要

Bicyclo 4,3,0 -nonenols of formula (I) (where R1, R2 and R3 are H or lower alkyl) are new and are prepd. by (a) irradiating an aldehyde or ketone of formula (II) and (b) separating (I) from mixt. of photo-cyclisation products obtd. (I) are components of perfume compsns. and aroma materials, and have la wood-like, camphor-like note.