Ortho-methyl quinoline (quinoline derivative) has a powerful, dark, leathery-animalic odor with earthy, tobacco-like and slightly floral (orange-blossom / narcissus) facets. In isolation it is pungent and almost tarry, but at trace dilution it lends a smoky, leathery depth reminiscent of birch tar and classic leather bases.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 961.
Yellowish or pale amber-colored liquid.
Very slightly soluble in water, soluble in alcohol and oils.
Powerful and tenacious, sweet-animal-floral odor with predominantly Civet-Honey-like character. Overall less floral, more Honey-like than the meta-isomer.
This material finds some use in perfumery as a supporting note in animal-type bases (with Civet, Phenylacetic acid, etc.) and also in minute amounts in variations of Lilac. It has good effects with iso-Butylquinoline in modern soap perfumes, but it must be kept at low concentration for such purpose. It has also found some use as a fortifier of Ylang and Jasmin-notes in heavy floral and animal-floral bases, and it blends well with Opopanax and Sandalwood for these purposes.
Produced from ortho-Toluidine by modified Skraup’s reaction, using an Iodine catalyst with the Glycerol.