Patent ID: 6783946
Filing Date: 2004-08-31
Classification: C07C,C07D

Abstract:
A non-natural amino acid compound of the formula I: wherein n is an integer of from 2 to 4; R1, R2, R3 and R13 are, independently, hydrogen or lower branched or straight chain alkyl, alkenyl or alkynyl of C1-C5; and C&agr; and C&bgr; are carbon atoms and the stereochemistry at C&agr; and C&bgr; is, independently, either R or S; or the ester or salt thereof, wherein when R1, R2, R3 and R13 are all hydrogen, then n is not 2 or 3, when n is 2 or 3, R1 and R13 are hydrogen, and R2 and R3 are independently hydrogen or methyl with at least one of R2 and R3 being methyl, then the stereochemistry at C&bgr; is not S, and when n is 4, and R1, R2, R3 and R13 are all hydrogen, then the stereochemistry at C&bgr; is not R.