Process for preparing phenyl butyronitriles and perfumery use of

Details Process for preparing phenyl butyronitriles and perfumery use of Process for preparing phenyl butyronitriles and perfumery use of

1991-09-13

1992-09-01

Reamer, James H.

Perfume compositions

Perfume compositions

Cyano containing active ingredient

25217411, 25218725, A61K 746

Patent

active

051438992

ABSTRACT:
Described is the use in imparting, augmenting or enhancing aromas to or in perfume compositions, colognes and perfumed articles by admixing therewith an aroma imparting, augmenting or enhancing quantity of 2,2-dimethyl-4-phenyl valeronitrile defined according to the structure: ##STR1## Also described herein is a process for preparing phenyl butyronitriles by reacting isobutyronitrile having the structure: ##STR2## with a styrene derivative defined according to the structure: ##STR3## according to the reaction: ##STR4## in the presence of a catalyst selected from the group consisting of sodium hydride and lithium diisopropyl amide having the structure: ##STR5## at a temperature in the range of from about 90.degree. C. up to about 130.degree. C. yielding more than about 65% by weight of product wherein R.sub.1 and R.sub.2 are the same or different and each represents hydrogen or methyl.

REFERENCES:
patent: 4459224 (1984-07-01), van du Weerdt et al.
patent: 4490284 (1985-12-01), Bruke et al.
patent: 4837351 (1989-06-01), Torihara et al.
patent: 4990494 (1991-02-01), Narula et al.
Semmelhack, et al, J. Am. Chem. Soc., vol. 102, No. 21, 1980, 6584-6586, (title of paper: "Arene-Metal Complexes In Organic Synthesis: Addition to Styrene-Type Ligands".

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