Patent ID: 7005519

Claim:
A method of preparing a compound of formula (I): the method comprising reacting one or more compounds of formula (II): in the presence of a base and a halogenating agent; wherein each A, independently, is aryl or heteroaryl; each n, independently, is 0–3; and each R 1 , independently, is C 1 –C 10 alkyl, C 3 –C 20 cycloalkyl, C 3 –C 20 heterocycloalkyl, aryl, heteroaryl, halo, cyano, nitro, OR a , NR a R b , SiR a R b R c , COOR a , OC(O)R a , C(O)NR a R b , N(R a )—C(O)R b , or SO 3 R a ; wherein each of R a , R b , and R c , independently, is H, C 1 –C 10 alkyl, C 3 –C 20 cycloalkyl, C 3 –C 20 heterocycloalkyl, aryl, or heteroaryl; thereby producing the compound of formula (I) in a one-pot reaction.