Patent ID: 8148423

Claim:
A rhodol compound having formula (VIII): wherein A is H, alkyl, alkenyl, alkynyl, alkoxyalkyl, heteroalkyl, cycloalkyl, cycloalkenyl, cycloalkynyl, heterocyclyl, aminoalkyl, aryl, alkaryl, arylalkyl, carboxyalkyl, alkoxycarbonyl, acyl, aminocarbonyl, a hydroxy protecting group or a reactive functional group; each of R 1 and R 2 is independently H, alkyl, alkenyl, alkynyl, alkoxyalkyl, heteroalkyl, cycloalkyl, cycloalkenyl, cycloalkynyl, heterocyclyl, aminoalkyl, aryl, alkaryl, arylalkyl, alkyloxy, carboxyalkyl, alkylamido, alkoxyamido, sulfonylaryl, acyl or a reactive functional group, wherein at least one of R 1 , R 2 , or NR 1 R 2 comprises a reactive functional group; each of K 1 , K 2 , K 3 , K 4 , K 5 , K 6 , K 7 , K 8 , K 9 and K 10 is independently H, halo, alkyl, halogenated alkyl, heteroalkyl, alkenyl, alkynyl, aryl, aralkyl, alkaryl, heterocyclyl, cycloalkyl, cycloalkenyl, cycloalkynyl, hydroxyalkyl, aminoalkyl, amino, alkylamino, arylamino, dialkylamino, alkylarylamino, diarylamino, acylamino, hydroxy, thiol, thioalkyl, alkoxy, alkylthio, alkoxyalkyl, aryloxy, arylalkoxy, acyloxy, cyano, nitro, sulfhydryl, carbamoyl, trifluoromethyl, phenoxy, benzyloxy, sulfonyl, phosphonyl, sulfonate ester, phosphate ester, —C(═O)—P 1 or —C(═O)—Q—P 2 ; each of P 1 and P 2 is independently hydrogen, halo, alkoxy, hydroxy, thiol, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, cycloalkynyl, aryl, alkaryl, arylalkyl, carbamate, amino, alkylamino, arylamino, dialkylamino, alkylarylamino, diarylamino, alkylthio, heteroalkyl, or heterocyclyl having from 3 to 7 ring atoms; and Q is alkylene, alkenylene, alkynylene, arylene, aralkylene or alkarylene.