7-7-dimethylnorbornane derivatives

Details 7-7-dimethylnorbornane derivatives 7-7-dimethylnorbornane derivatives

C - Chemistry, Metallurgy

12

P

C12P 13/04 (2006.01) B01J 21/02 (2006.01) B01J 23/20 (2006.01) B01J 27/053 (2006.01) C07C 29/56 (2006.01) C07C 29/78 (2006.01) C07C 35/29 (2006.01) C07C 45/00 (2006.01) C07C 45/62 (2006.01) C07C 47/115 (2006.01) C07C 47/225 (2006.01) C07C 229/28 (2006.01) C07C 233/47 (2006.01) C07C 233/48 (2006.01) C07C 255/31 (2006.01) C07D 233/74 (2006.01) C07D 233/76 (2006.01) C07K 5/072 (2006.01)

Patent

CA 2065014

2065014 9102711 PCTABS00003 The present invention discloses 7,7-dimethylnorbor- nane derivatives useful as intermediates for the production of various synthetic perfumes and high intensity sweeteners. 2R-exo-7,7-Dimethylnorbornyl acetaldehyde, 3-(2R-exo-7,7-dimethylnorbornyl)-2-amino- propionitrile,3-(2R-exo-7,7-dimethylnorbornyl)alanine hydantoin and N-acyl-3-(2R-exo-7,7-dimethylnorbornyl) alanines are disclosed. The present invention describes a process for making 7,7-dimethylnorbornane derivatives, 3-(2R-exo-7,7-dimethylnorbornyl)-L-alanine lower alkyl esters and alpha-L-aspartyl-3-(2R-exo-7,7-dimethylnorbornyl)-L-alanine lower alkyl esters. A process for making alpha-fenchene, a process for making alpha-fenchyl alcohol and a process for making an optically active 3-(2R-exo-7,7-dimethylnorbornyl)-L-alanine or its lower alkyl ester are also disclosed. Dehydration and rearrangement catalysts are also disclosed.

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