Organic compounds
A compound of formula IV: wherein R 1 , R 2 , and R 3 are, independently at each occurrence, a C 1 -C 20 aliphatic radical, a C 3 -C 20 aromatic radical, or a C 3 -C 20 cycloaliphatic radical; Ar is heteroaryl, aryl, alkyl or cycloalkyl; b and c are, independently at each occurrence, an integer ranging from 0-4; a is an integer ranging from 0-3; and n is an integer ranging from 2 to 4.
1. A compound of formula IV:
wherein
R 1 , R 2 , and R 3 are, independently at each occurrence, a C 1 -C 20 aliphatic radical, a C 3 -C 20 aromatic radical, or a C 3 -C 20 cycloaliphatic radical;
Ar is
a is an integer ranging from 0-3;
b and c are, independently at each occurrence, an integer ranging from 0-4;
d is an integer ranging from 0-4;
R 4 is a C 1 -C 20 aliphatic radical, a C 3 -C 20 aromatic radical, or a C 3 -C 20 cycloaliphatic radical and
n is an integer ranging from 2 to 4.
2. The compound of claim 1 , wherein n is 2.
3. The compound of claim 2 , wherein d is 0.
4. The compound of claim 2 , wherein a is 0.
5. The compound of claim 2 , wherein b is 0.
6. The compound of claim 2 , wherein c is 0.
7. The compound of claim 2 , being of formula III
8. The compound of claim 1 , wherein a is 0.
9. The compound of claim 1 , wherein b is 0.
10. The compound of claim 1 , wherein c is 0.
11. The compound of claim 1 , wherein n is 2.