Patent ID: 7608731

Claim:
A compound according to formula Va wherein: R 2 is an aryl radical and said aryl radical is optionally substituted with zero to three substituents independently selected from the group consisting of C 1-6 alkyl, C 1-6 alkenyl, C 1-6 haloalkyl, C 3-8 cycloalkyl, C 1-6 alkoxy, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 sulfonyl, C 1-6 haloalkoxy, C 1-6 haloalkylthio, hydroxyl, halogen, amino, C 1-6 alkylamino, C 1-6 dialkylamino, C 1-6 N,N-dialkylcarbamoyl, nitro and cyano; R 4a is in each occurrence is independently hydrogen, C 1-6 alkyl or benzyl; R 5 is H or CO 2 R 5a : and R 5a is independently in each occurrence a straight or branched C 1-6 alkyl.