Patent ID: 7893224

Claim:
A compound represented by formula VII: wherein: R 1 is optionally substituted aralkyl, —Si(R 7 ) 3 , —C(O)R 7 , or —C(O)N(R 8 ) 2 ; R 2 represents independently for each occurrence H, alkyl, or halogen; R 3 is R 4 is alkyl, aralkyl, —Si(R 7 ) 3 , —C(O)R 7 , or —C(O)N(R 8 ) 2 ; R 5 is halogen; R 6 is alkyl; R 7 and R 9 represent independently for each occurrence alkyl, aryl, or aralkyl; R 8 represents independently for each occurrence H, alkyl, aryl, or aralkyl; R 10 represents independently for each occurrence H or alkyl; R 11 represents independently for each occurrence H, alkyl, or halogen; x is 1, 2, or 3; y is 1 or 2; and m is 1, 2, 3, 4, 5, or 6; and sterioisomers thereof.